For the first part, there are plenty of those (crypto online shops that sell shirts [nothing special]) but for the latter part, it depends on the type of incentive program you're trying to provide (you might want to give more details).
You might get more responses if you move this to "
Marketplace" board (use "move topic" option from bottom left corner of this page).
There is much more to it than what I wrote, but I am just trying to get an idea of how people feel about it, without revealing too much.
Thank you for your reply, I am kind of new to forums, so I will be moving my topic right away!