It's not like most of them are complaining about the fact that backwards compatibility used to be free (arguable if you only had one DS), either. It's all about the fact that they're imagining Nintendo is going to turn into EA overnight and start charging for event Pokémon and other stuff like that, just because they're charging for Bank. What the hell? They charged for Box, they charged for Ranch, and were they complaining back then? Of course not, judging by how much they're acting like big babies they were still in the womb.
Let's see here... Box came out in Japan in May 2003. That's ten years ago. If Nintendo was going to go down a slippery slope of nickel-and-diming, they would've done so long ago. As it stands all they're doing is relying too much on Mario to fill their coffers when their backs are against the wall.
As I said in my LP video, having to pay for the ability to transfer Pokémon kinda sucks, but they did say a while ago that they tried different avenues, to no avail. I guess what you make out of that depends on how much you trust the company, but I myself am inclined to believe they did a valiant effort, but the technology gap just wouldn't allow it. Am I the only one who finds the fact that a DS has an easier time communicating with a GBA than a 3DS amusing, if only because cosmetically and functionally it's closer to the 3DS than the GBA? Never discount that under-the-hood stuff, I suppose.
Anyway, my personal impression is that the trial period is mostly meant for those people who just want to transfer everything from their gen 5 games to gen 6 and be done with it, so that at least they won't have to pay anything. I think if Nintendo really wanted our money that badly, we wouldn't even get a trial period. I mean, why else would you need a trial period? It's not even like this is a game that you might want to try before buying it. You know exactly what you get going in. It's just storage, Pokémon transfer, and that's it.
I swear, the internet is the cancer of gaming, moreso than the companies themselves.