Actually it seems that Tim Shafer is directly connected to this Fig company as he's on the advisory board. An accountant goes over this in detail(link below), it seems there's great risk in "investing" with this and very little chance that anyone can earn a return with how it's set up. You would actually be investing in the Fig publishing business rather than directly with Double Fine, this publishing business is already losing money so there's a great chance that it will go bankrupt within 12 months(it's just being propped up at this point). It's just set up in a way that Tim keeps the money no matter what happens, even if the publishing company goes out of business it's basically just a shell that funnels money through it, it's just legally if it goes under you get no protection and you'll lose everything "invested" in it.
https://www.youtube.com/watch?v=hFX0f_YUn1I