I have known a few people who did this, and they thought it would be a great way to supplement their income while at school, and my recollection is they ended up thinking it wasn't such a good idea later. So, what do you guys think? Is my recollection correct? What are the pros and cons?

Added twist, my son's roommate tested postive for COVID-19, and so there's a good chance my son will have it too (getting tested today), and will therefore have the antibodies. He says that makes his plasma worth more???