It would definitely get my attention. But while I love bitcointalk, when it comes to investments, I'll probably treat it the same way I do with other investments— I'd have to research first before jumping the gun lol. I mean, there has to be some sort of whitepaper detailing the plans, to start with. I would need to envision a future, preferably.
Whatever the case, I'd surely support it in some other way. For instance, giving feedbacks or sharing to folks. Perhaps a small amount of donation could be in the picture, as well.
But I think it's more likely for some non-staff regulars to organize said thing rather than bitcointalk team.
Would you still be comfortable if the management of the bankroll and initial investment was completely centralized, though. In the end, this is about whether you are okey with sending your investment to the wallet of someone you have never met face to face, and it is in charge of handling your capital to make it grow through time.
It would not be so different from depositing the bulk of one's money to a centralized platform like Blockfi, in exchange of juicy yield returns. It is all about trust.
I would be safer of the bankroll could be deposited in a smart contract and the code could be audited by anyone in the forum, to know how secure the funds are and how they are being used by the communitary casino. Some multi-signsture implementations would also come handy, if you asked me.