Happy to see this.
The author of that post and president of Y Combinator, Sam Altman, has written a couple times about technology risks including tech-driven inequality. If the IP policy for YCR is at all motivated by those worries, that’s a great sign. Even if not, it’s a good policy.
It could still help YC startups and add to YC’s bottom line, benignly through YC people having more intimate knowledge of the research, given them/funded companies a competitive advantage. Or less benignly through watching the research pipeline and moving innovation to freedom infringing venues (anyplace with a different policy, such as a YC startup), just as professors can move innovation to a startup or consult with a company in order to not share the take or control with a university technology licensing office. But of course YC Research has a much better starting policy than do post-1980 universities, at least in the U.S.