It was fucking horrifying reading up on that practice. It freaks me out to even type out this stuff but it's all true.
Of course it'll be many years or decades before we have any real clarity on that, but if it works, and if it's a negligible, non-risky amount of blood donated by each person which also isn't risky for the recipient, and if it can be afforded, it really feels very ignorant not to sign up, to me. They just need to lower the costs so ordinary people can easily partake as well, not just super wealthy people.
Obviously giving away an organ is far more health-adverse than giving away a small amount of plasma. Unfortunately, lots of people already do donate plasma in exchange for money because they desperately need the money, and that's just for plasma that goes to sick people. In my opinion, if rich people are offering those same plasma donors 10x or more than the amount they'd get from donating to a typical blood bank, then it's at least a big improvement over the current situation. And hopefully they put limits and ID checks in place to ensure people never donate above a certain amount of plasma per day/week/month and risk their health.
Hopefully we'll one day be able to grow or synthesize the youth-preserving compounds in the plasma without requiring the donors.