On my humble opinion, there's great potential for Itch App to become a cross platform distributor solution, if we could sell our browser games.

Right now, if you label a game as "to play in browser", it's automatically becomes free, but people can also download it to install on Itch App. That's where a "pay wall" of sorts would do the trick, because the Itch App is already available for Windows, Linux and Mac.

So, why not?