The open source version has to be good and valuable enough for you to bring it in as a dependency in a basic setup, and then the paid versions provide support f

The open source version has to be good and valuable enough for you to bring it in as a dependency in a basic setup, and then the paid versions provide support for larger scale setups where the requirements are a bit different. There are many ways to do that, depending on what you're offering. Limits and quotas are easy enough.