I use itch.io to find games to play on my youtube channel a lot. The affiliate code system has been good to track people going through the links i put in my descriptions so far.
Do you have any specific plans for it? If not I'd find it really useful to get not only attempted and bought info but also a way of seeing how many people click it total.
On top of that, the money making part is cool and I think the best way of making it fair is implementing a slider similar to the "itch.io's cut" bar on the developer's end so they can decide what I get for sending people to their game if anything.
I haven't thought on this long so I dont know what problems there might be but I'd love to see it expanded upon!