What bothers me even more that we have here in America is frequent plasma donation. You can do it up to twice a week, so that's 8 times a month. Typical pay out is around 50 dollars, unless you're new then they usually have some promotion that pays extra your first few rounds.
One time I did this when I was broke, I donated plasma at a place called CSL Plasma, and made 80 bucks. Never again. The experience is like something straight out of a techno horror film. No one is making any sounds. Nobody is speaking. There's about 20-30 people laying in beds in rows hooked up to machines pumping the blood out of their bodies and filtering out the plasma. Everyone has their phone out or is just laying there with their eyes shut trying to keep it together. They tell you to expect feeling physically weak and drained afterward, but what they don't tell you is how spiritually draining it is. I honestly cried pretty hard on the way home afterward and felt one of the worst pains of regret I've ever felt in my life, even worse than the time I tried smoking cigarettes to see what it was like. It felt extremely awful, like there was a filth within me I could not remove for an entire week after that. I have not and will never do that ever again.
You can say it was just me, just in my head, but I don't buy it. If you've been to one of these places, you can feel it. You feel the corruption right away, it's not a "projection". It's real energy coming from these places, like, concentrated acosmic evil. Trust me, personally I vibe to the anticosmic gnostic current, and I know what true evil is when I see it. Not petty "I don't like you" calls for revenge, not even traumatic evil caused by psychopaths, I'm talking about systemic anti-cosmic chaos flourishing in specific contexts because this world is in such a sharp decline right now. This is one of those places. This is like, the kind of awful shit you don't want your ancestors to see, no matter who they were. You want them to rest in peace believing this kind of shit doesn't happen, that it would never get this bad. But here we are.
I dunno man, donating blood is one thing if it's being taken while you're in the ER or at the hospital or as part of your routine check up, but like others have said, having it "used" for anything else... and having it taken from you for any other reason... it carries a spiritual stigma that leaves a really, really bad residue in your life. At least, in mine and those I've talked to about it. Hell, even my friends who don't believe in anything paranormal or supernatural still agree with me that it just seems wrong, like, instinctively in your bones you know this is crossing some boundary we shouldn't be crossing. And they're right.