THFP I mean, if you want to look at it in the most pessimistic possible way, sure.
It's not like online ccgs or anything. You don't end up disadvantaged for not buying skins. The game doesn't turn away people who just want to play. If you want skins, you play. You earn your free rolls. And if you don't get what you want, you have the option to pay for extra rolls/shop exclusive skins.
Also the devs have said they've got plans to extend the reward system in the future, past lvl 100 so people can earn more Nemo bucks and such, but it's not their priority as currently they're working on new maps, modes, and bug fixes. Given they are a small development team, they can't do all of it all the time, and they're catering to the games playability first and foremost, as they should.
TLDR
The game doesn't cater to whales. There's just a lot more to it than your patience is willing to account for.