Hi, Lead FE @ GitLab. When my team and I are developing, we spend a majority of our time, writing code for the community edition (the open source and free version) of GitLab. Also GitLab.com is a priority.
Under the "Can I add more users to my account" faq it indicates that additional users would be billed at 50% upon renewal, while the following question "The True-Up model seems complicated" indicates that additional users would be billed at full price.
I'm not in the market right now, but for people that are this might be a bit confusing.