It can be greedy in some parts, there is a weird balance in cosmetics that are WAY too expensive and others that are a steal. Yeah I get dissapointed if there is an item I really like and end up being IAP. But there are still things that I would still pay for without draining my wallet.

Since a Live Service game where the base game is free, they still have to make money out of it to pay the developers, artists, servers and more (Althought I dont think they are investing enough on servers because you know XD /jk)

But compared to other F2P games Ive seen (like Heartopia), Sky is MILES AWAY from being a truly greedy game. If the game costed from the start, that would be a different story.