First idea only works if the company is rich to do such a thing, you do not see this happening anywhere else not even in GOG. Discount only hurt developers, steam ??% (remamber there is no 30% and developers can not say the numbers because they sign a contract) plus the X% cut means less money. This will never work, it wont work on itch since X% can be anywhere to 0-100 this just means less money on what they already are ok to give to itch.io site.