Picking red guarantees your survival by endangering everyone else, making it morally fucked, but risk-free. Picking blue puts your life at risk, but saves everyone's ass if it pays off, making it the more moral option overall. Picking blue also requires you to put some trust in your fellow man, so I'd have probably picked red if I didn't know how the Twitter poll came out.

Someone else on the orange site claimed the experiment would end with only red-pushers left if it went for multiple rounds. Adding my two cents, the outcome would depend on how the first round goes - if red wins round 1, voting blue looks like suicide, shifting the calculus in red's favour, and if blue wins round 1, you have reason to trust everyone will continue voting blue, making it a lot less risky and shifting the moral calculus in blue's favour.