People get creative when trying to generate money for charities. Tony Hawk donated blood to be infused in skateboard paint benefiting a charity, "Apparently I didn't read the fine print and now Liquid Death officially owns my soul, and my blood, too. I don't know, it's very confusing. They're taking my blood, and they're gonna use it for skateboard graphics."
It worked, the limited amount of skateboards sold out in advance.
Props to Hawk for using his popularity for good things, "So if you have my blood, that means you have my DNA." More here.