Idk, LJ doesn't have a boss that takes a portion of the profits he generates. Extraction of surplus labor is the cornerstone of capitalism. But this isn't really the place to get into a deep discussion about regardless. I don't think it's profiteering either to charge an amount that provides you with a living wage. Sync for reddit had orders of magnitude more users than the Lemmy version so of course he'll need to charge more on Lemmy to keep doing it full time.