Sean Parker, the Napster co-founder and onetime Facebook president, called Bill Gate's Billionaire Pledge, a promise to give half of his wealth away before he dies, "a good start" according to the Chronicle. That's to say that by the time Parker is dead and gone, he plans to part with all of his riches — an amount the Verge puts at $3 billion (thanks, Facebook IPO!) And since he isn't going to spend it all on legalizing pot, the 36-year-old billionaire has announced a $250 million contribution to the eponymous Parker Institute for Cancer Immunotherapy, a massive, Presidio-based research center and extended network that will seek to harness the power of the body's immune system in the fight against cancer.

Parker’s gift will come over the course of seven years from his $600 million foundation, the Business Times explains, and the donation goes to a potentially $1 billion effort with big-name researchers from UCSF and Stanford attached. In full, the Parker Institute for Cancer Immunotherapy will have room for 300 or more researches in 40 laboratories at six centers in total.

“With government grants, you really have to have (a program) half-done before you get the money,” UCSF’s Lewis Lanier told the Business Times. By contrast, “Parker allows us to take a new, crazy idea and immediately put some seed funding in it to see if it’s going to go anywhere.”

That crazy idea: immunotherapy or immuno-oncology, which Parker has invested in before. Previously, he's supported University of Pennsylvania researcher Carl June, who will direct part of the Parker Institute for Cancer Immunotherapy at that campus. June's treatment of patients for a form of blood cancer has been effective according to peer-reviewed medical journals.

In an essay published in the Wall Street Journal last year, Parker positioned himself as a new kind of "hacker philanthropist." Of a new bread of tech billionaires with hacking mentalities and wealth to spare early in life, he wrote, "This new generation of philanthropists wants to believe there is a clever “hack” for every problem, and they have launched a number of radical experiments."

Immunotherapy fits the bill, it would seem. As Parker put it in a statement:

"We are at an inflection point in cancer research and now is the time to maximize immunotherapy’s unique potential to transform all cancers into manageable diseases, saving millions of lives... We believe that the creation of a new funding and research model can overcome many of the obstacles that currently prevent research breakthroughs. Working closely with our scientists and more than 30 industry partners, the Parker Institute is positioned to broadly disseminate discoveries and, most importantly, more rapidly deliver treatments to patients."

Parker's initiative will fund institutions including Memorial Sloan Kettering Cancer Center; Stanford Medicine; the University of California, Los Angeles; the University of California, San Francisco; the University of Texas MD Anderson Cancer Center; and University of Pennsylvania. And, in Parker fashion, the'll share intellectual property, granting equal access to discoveries any of them makes.

You know, sort of like Napster, but for immunotherapy.

Related: Napster Co-Founder Sean Parker To Fund CA Marijuana Legalization Ballot Measure