Except you're not paying for something that was originally free. Yes, transferring has been free, but this is also extra storage, all of which (Pokemon Box & My Pokemon Ranch) have always cost extra. And they even cover that with the free month trial version. Don't care about storage? Transfer all your 'mons in the first month and you're golden. A pretty damn good deal, I'd say.
Admittedly, it would be nicer if you could simply transfer Pokemon without needing to use the storage. The $5 storage thing is fine, but since you need to use it to transfer, transferring itself doesn't exactly feel "free." There is the one month trial, yeah, but there will be some people who will want to transfer things after that period ends and don't want to pay for the storage service. It's a minor hypothetical issue, but one that's somewhat justified. I'm just a little annoyed that we have to wait until December to use it. I'm probably just impatient with that, but I don't want to wait so long to transfer my Pokemon.
To those of you who are afraid that GF will charge for DLC: They won't! Masuda has said that they won't charge for DLC. The Pokémon Bank isn't DLC, it is an app, just like the Dream Radar was. If Masuda says DLC will be free, it will be!
Yes, why do people always forget Masuda said that? If he says DLC will be free, then there's nothing to worry about.