It's not _just_ read, it's read and modify but not redistribute in a way that competes with the original product,
> So what is the point of picking software using this license over traditional closed source?
I don't want to compete with Sentry (or a variety of other open-like applications), but I _do_ want to support my employers identity provider, fix bugs (and push them back), and maybe even add features that I/my team use. As an example, I've personally contributed multiple bug fixes, performance improvements and documentation changes to sentry's libraries. I don't want to compete with sentry, I want them to maintain my improvements and for other developers to benefit from my work.
> So what is the point of picking software using this license over traditional closed source?
I don't want to compete with Sentry (or a variety of other open-like applications), but I _do_ want to support my employers identity provider, fix bugs (and push them back), and maybe even add features that I/my team use. As an example, I've personally contributed multiple bug fixes, performance improvements and documentation changes to sentry's libraries. I don't want to compete with sentry, I want them to maintain my improvements and for other developers to benefit from my work.