That's weird. You couldn't pay me to take other people's blood. Much less the other way around. I mean, in dire need, sure I'd take it but not for funsies. If you want to feel better, go the gym, sheesh. But whatever I don't give a shit. People get paid for their blood all the time. It's a renewable resource. There's also more of most blood types in blood banks than they need; they just encourage people to donate so they can find the rare types and suck them dry.