That's what about 90% of blockbusters are for: to make money. In fact, that's pretty much how the movie industry is run nowadays. Also, that had bugger all to do with my point about adaptations.
What I mean is, in my eyes, they don't care about the films being accurate (if not exact) to the books because they just want to make money not tell a story.
The Horntail was the most vicious dragon, and Harry was the youngest champion, and also the one treated with the most disdain; the first task was designed to put that to rest. It didn't matter how it was done, so long as it showed Harry's skill. The movie version achieved that very well.
The book version did it better, she wouldn't take off because she was trying to stay with her eggs to protect them, makes perfect sense, so Harry had to figure out how to get her up (shows Harry's intelligence which is something that's not always emphasised). And one can presume that all the wizards on hand where able to restrain her once Harry got the egg, hence there was no reason to put in that several minute long chase except to show off with special effects.
In Prisoner and Goblet, Ginny just acted shy around Harry, then by Order started becoming more confident. Her role in 3 and 4 was minor at best, so it was a necessary cut for a little thing called suitable running time.
Her interactions with Harry help build their story so it doesn't seem to come out of nowhere in
HBP;
~ In
CoS it's pretty much clear that, to use JK's words, while he does seem like a rock-god to her that from what she hears from her brothers - cause let's face it she would have heard about him from them - she's actually gained a very good understanding of him, as she knows why he doesn't want any more fame.
~ In
PoA not only is it clear that she's more in love/infatuated with him then before but she's still able to share a joke with him by eye contact, and sharing jokes that way is something that as far as I can remember - and I re-read the series not long ago - is something that Harry does virtually exclusively with Ron.
~ In
GoF she's basically normal around him - certainly more then in the past - but still quiet and then there's that big moment where she feels crushed that Harry wanted to ask Cho to the dance and decides that she doesn't want to be his 'second choice'.
~ In the
OotP book where she comes right out of her shell around him (to the extent she is the
only one of his friends who can calm him down from one of those towering tempers he has that year, and is able to cheer him up too).
*Shrugs* That's just my PoV though, I dunno maybe I just see their interaction in the books more then others, pry cause I've spent so much time arguing shipping wise.
But then they had that problem with the Harry & Cho relationship in the films, Cho doesn't appear in
PoA but in
GoF we're got Harry slopping food down his front at the sight of her without any indication of how he crushed on her...
It would have pretty much gone like this: "Oh yeah, and me, Sirius, Pettigrew and your dad created the Marauder's Map. Bye now!" Just a straight dump of information. Do you really have to have everything spelt out for you?
The Marauders later turn into a fairly big deal so it would have been nice to see that scene from the book in the film.
My memories of this are hazy, but I'm pretty sure they cut out the scene in the cafe where it all falls apart, so they needed her to be the traitor so the relationship could end. Also, again Marietta is not given any significance until she gives them away, so she could be cut out and replaced very easily.
Yes, they cut out the fall apart scene so they had to dig themselves out of it by messing with something else instead.
Crouch Jr.'s involvement with Voldemort isn't noted upon until his confession, which took up about half a chapter. That big an information dump would have been too much for an audience to take in, so his role as the one to resurrect Voldemort needed to be made more obvious. Hence why he appears at the House of Riddle, and why he seems proud of being a Death Eater (the sudden personality change between scared youth and sociopath was too much of a gear change).
I don't see why they had to muck with the timeline though, by all means he can do his thing at the world cup but there's not reason we have to see him or that he is already free thanks to Tom by that stage (the mystery of the mark worked well in the book).
I thought what they did with the trial was fine, thought it fit slightly better then the trial bits in the book - although I find it a little harder to accept that Crouch Sr would have taken his son back into his house even as his wife's last request.
With the Firebolt, there's a limit of one Quidditch game per film, due to budgetary and time constraints. Introducing it at the same time it did in the books, without the pressure of another Quidditch game, would have just seemed odd.
PoA is basically the Quidditch book though, no other book has it being as important as it is in
PoA (I mean in
HBP for example it's more something that helps Harry get together with Ginny). Basically cause Harry grows to accept there are things more important then it by
OotP.
Also the Firebolt's affect on the Trio is a big part of the story too.
Just because something works as a book doesn't mean it will work as a film. A book has to hold the reader's attention over every page and doesn't have to follow any time constraints; films have to keep the attention held for around two hours, any more and the audience would start to get antsy.
Yes there are differences between the mediums, but I don't see why that means book and film have to diverge so much in various places.
An intermission can damage the flow of the film. Imagine: you're really immersed in it after a bombastic action scene or whatever, and then the film stops for about half an hour. How would you feel about that?
Well for starters you can create little down moments in the film, tension wise, where you could stick an intermission in.
The writers worked very closely with Rowling, and I'm sure anything she wouldn't have liked would have been fixed. Also, she wanted Terry Gilliam to direct the films, but Warner Bros. hired Chris Columbus to make things more family friendly. I don't know if you've heard of Gilliam, but he would almost certainly try and bring his own vision of the books' universe to the screen, and he was Rowling's first choice.
Yeah... this is something I'm sorta not clear on. Cause to me, and this might simply be my PoV, they've messed so much with the story that the films are a separate canon from the books yet is is clear in places that JK was consulted... So I dunno.
Also I have to acknowledge, I did read the books a lot before any of the films ever came out and formed a very clear image in my head of what that world was like and I suppose part of my dislike for the films may well have come from the fact they've never managed to match my imagination *shrugs*.