You don’t get paid until after they’ve drained you and you don’t get paid what’s advertised unless you go back a couple times a week for a month. Then they drop the rates on month 2 onwards. And if you get a shitty tech and they blow your vein you’re blocked from donation for a long while after

Plus it leaves you hungry and tired for a day after. Although if you’re an alcoholic it’s a neat trick to make your liquor go further. Otherwise it’s a real run around. And they pay less every year as more and more people get desperate enough to try it.