I do. I donate as often as I’m allowed, which is about 4 times a year. The only effect I’ve felt is that exercise, especially cardio, is a bit harder. My time on a 5k run dropped noticeably.
Donated 60 times in total so far, which means there’s more of my blood in other people, than in me. By quite a lot.
Sounds a bit like zeronet that I think is dead now, but was pretty cool when I tried it.
https://github.com/HelloZeroNet/ZeroNet