Have you thought of offering users the possibility of either buying a license and then being able to do whatever they want or to host the games they want to offer to the public on your own sales platform where you could deduct a percentage of whatever sales are until your share equals the value of the license? This would encourage people who might not have the means to buy a license at the moment to still do their best to make their game as good as possible as to make it attractive two potential buyers and thus put more high quality products on your site leading to more traffic.
Meanwhile, do you have any idea of a time frame for Android exports?
Kind regards,
A.