It is no coincidence that many of the companies that have used this developer program: Pull Panda, Dependabot and others like Semmle, Spectrum, etc. have been acquired by them. It starts looking a lot like going in the trajectory of an Apple App Store-esque developer platform in terms of lockdown to me.
I know GitLab isn't perfect, but I truly appreciate their openness[1] and willingness to partner with others in this space that are trying to improve developer tooling. If we want better developer tools, we need open platforms for those tools to exist.
[1] https://about.gitlab.com/partners/integrate/
Disclaimer: I work in the space (@ Sourcegraph) but the words/thoughts here are my own, I'm not a corporate shill (I hope) :)