o7 Amerikkka
I actually donate about twice a week to help pay bills. I agree with people hearing about the practice of blood for money and saying "that doesn't sound healthy.". I actually feel awful for 24 hours or more post donation.
It's also really cool you don't get saline anymore because the US is out of it. Just a Powerade and goldfish so you don't pass out driving home
Honestly sounds weird to give saline after a blood/plasma donation if someone is fit and healthy. The Red Cross doesn't do that in Australia (and it's not paid just voluntarily). Just give you a bunch of water and something to eat. If your gut is working, oral replacement of lost volume is pretty quick.
Probably the difference in the US is the standards are lower and the people they're taking plasma from a less healthier, done more frequently, more vulnerable etc.