Back in October, he also hired "Sourcehut's first developer", but he gets paid to work on Drew's personal or favored projects (like Sway), not anything directly related to Sourcehut: https://sourcehut.org/blog/2019-10-15-whats-cooking-october-...
Sourcehut is in an alpha state, and is barely functional in a lot of ways. People are paying for it anyway because they support the site's vision and what it could be, and want Drew and the site to have the resources they need to continue working on it, so that it can eventually become something that's actually worth paying for.
Those people are paying for Sourcehut with the expectation that the money will be reinvested into Sourcehut and used to maintain and improve it. None of them are doing it because they want Drew to buy random people microphones so they can make videos for Peertube.
For someone that writes so vehemently about topics like tech and business ethics, it's extremely hypocritical for him to keep using Sourcehut's money as his personal slush fund. Maybe someday if Sourcehut is incredibly successful and they can't even figure out how to spend all their money this will be a reasonable thing to do, but right now it still needs these resources that are inexplicably being redirected to other projects instead.