>>38596747The absolute most you can pay for a skin in Arknights is like $15 and that's if for some reason you don't want to just use the free currency they give you for it.
In terms of collabs, Granblue had a One Piece collab earlier this year that gave you Luffy, Nami, Robin, Zoro, and Sanji all for free by just playing through a quest that took an hour or two at most if you didn't just skip through all the text. Most gacha games treat collabs as a way to attract new players and make them super generous.
