Well. I needed some extra money so I came here. It's about $50 a time for the first five times, they immediately pay you on a prepaid card. it takes 2-3 hours usually. I did my five donations (it drops to $20 after that) and haven't been back. It isn't the cleanest place, and the front desk workers deal with crap all day I'm sure, so they are about as friendly as your average fast food worker right after they've been cussed out. The people taking your life saving blood out of you for the company's enormous profit are pretty nice.
I hated going there. But, I needed the money. As far as getting money without doing any actual work, this isn't the worse place to go.