An example of an anti-user feature I think Obsidian might fall into is making the end-user the product for the free tier. That's just how those business models

An example of an anti-user feature I think Obsidian might fall into is making the end-user the product for the free tier. That's just how those business models work, they are inherently anti-user because the user is the product. FOSS allows you to choose to be free tier or pay for their services. The difference is in the free tier: you can do the leg work and hack together your own systems to match their paid services (namely public hosting). Its sort of a promise that you can use, audit, help improve, and love the free product without having to be concerned about forfeiting your privacy or security. Additionally, FOSS projects always benefit from community auditing of the code, increasing the reliability and security of the software instead of relying on a few individuals to catch bugs. Anyways all this to say "not FOSS" might not count itself, but implies there are other anti-user features at play.