Ask HN: Which bootstrappers have sold equity to take some chips off the table?

I am trying to compile a list of bootstrapped founders who have sold equity in their startup not to finance the company, but to simply pocket the cash.

One example here could be the founders of Basecamp, Jason & DHH, who sold a minority stake to Jeff Bezos back in the day to make sure they have something to show for in case the business failed.

There appear to be many founders of VC-backed startups who do this in later funding rounds, but I am trying to understand if this is also something in the world of bootstrappers as well.