Again…?
It’s there to detect minors. Only minors would have an issue affording the $5. Android devices are much more accessible than PCs after all. And android is harder to make than pc, but that’s not important.
Android devices are much more accessible. Windows devices are generally shared amongst family hence why it's free. As in parents are likely to find it installed. Minors frequent itch quite often since the VNs are generally pretty cheap and easy to get into. A lot of Pokemon fangames made with RPG maker made it big on here at one point as well. Ex. Pokemon Mineral.