quid-pro-quo against Gitcoin's tos ok my bad found it: https://gitcoin.co/wiki/grants/

Forbidden to offer reward? I can't find anywhere stating it's forbidden to offer a reward. I searched through Gitcoin's CoC, Wiki, and Legal pages. Websites such as kickstarter and gofundme support offering rewards to donators.

"Screenshot from the Twitter" We have a screenshot that proves that there were special benefits provided to those who donate >1$ for project. "It is forbidden to offer a reward to people funding the grant."- Rules.

Screenshot from Twitter Here is a screenshot from the twitter page of the game where you can see that they give in-game items to the contributors. Here is the link to the twitter page : https://twitter.com/synergyofserra

Video Capture It looks like the vast majority of the contributions are indeed providing an in-game address, therefor expecting a kickback