In addition to what Trevor said about is being difficult to getting deals with the game studio and referencing humblebundle, I think it would be interesting/slightly easier to spin off humblebundle and offer multiple copies of the same game. When my friends and I purchase a new game on Steam or PS4, everyone else usually buys the same game so we can all play together. If there was a platform where there's tiered 'bulk' buying so the buying 1 copy will be full price, 2 copies/5% discount, 3 copies/8% discount, 5 copies/10% discount, or something along those lines I think it'd be a solid platform. It'd probably be less difficult to create and also easier to strike a deal with game studios since you're argument would be that you're encouraging more sales rather than just offering a discount on one item, which they'll probably view as a loss. Another reason why this would appeal to them is that this buying in 'bulk' would increase the community outreach and pickup.