It's in no way "basically open source", and the list strikes me as completely impartial. You cite Sentry, which says this on their licensing page:

> All components powering the main Sentry and Codecov web apps use FSL, which limits their usage in a commercial Sentry-like offering.

The license limits usage in a commercial context. That's not FOSS by the OSI's definition, which is the definition I care about.

Heck, you can tell from the URL that Sentry _really_ wants to pretend they are open source.

https://open.sentry.io/licensing/