I don't know how useful this is as an idea but I thought you were going to suggest offering games where a certain amount (say the jackpot or the house edge) was invested in a company the user picked (and split between you and them, or just held by you with them making a fraction back if it does well). This could still be manipulated (unless you had something like a 2% house edge where 1%is invested or something but it might be an interesting concept as the wagered amount can get quite high from a single deposit and 1% of that could be fairly big for a "risky" investment).
I was thinking of introducing a capped pot.
The capped gambling amount (the maximum funds that can be put into a pot -also voted by the community) should be below the "not worth it" factor for developers who are thinking about sabotaging their current project to unfairly win huge riches.
So lets say 50k USD cap was voted by the community because the developers have invested 500k into the project already. They will not sabotage their 500k project to win the 50k pot. It won't be worth it. And instead, it would be worth it to bet on their success because they would win money to further finance their project.