Maybe they object to the idea that anyone's labor should be used, for free, to enrich the wealthy. I don't think that's a terrible stance to have, abstractly. I dunno if that was the case here.
If you read it they state quite clearly that they feel like their participation was different than they expected it to be and that's why they are upset.
The fact they said yes at the start shows a form of tunnel vision. I just can't empathize that much with borderline manchildren leaking access to something they got the privilege to