On: Older mouse brains rejuvenated by protein found in...

[nostromo]

Blood donation centers make money when they sell your blood. Blood is a profit center for a lot of organizations. That's a big reason they're always bugging you to give more.

[BurningFrog → nostromo]

Ultimately that blood goes to improve someone's health on average, I assume?

Seems a worthy way to make money to me.