Make it possible for GitLab EE users to run FOSS projects

Description

Problem: we use gitlab EE for our company's projects, and we're quite happy with it. We also have an open source product that we offer, which we develop in the open (much like GitLab). We don't make money off of this project, only off of services we sell on top of it.

The problem is that in order to develop in the open and gain contributors we need to make it possible for people to sign up so they can submit issues and create MR's and all that. However, since this is an enterprise install we need to pay for those users. That's not feasible.

Proposal

I would like to see it possible for GitLab EE customers to have a usertype "external contributor" who can only see/partake in any public projects and would not be counted towards the users paid for.

Links / references

https://gitlab.olindata.com/opstheater is where the FOSS project lives I mentioned above.