I do agree that developers should use their own software, but doing so on a smaller instance with strict active user limits is probably the right call – at least until you are certain the software has a “stable” version, but even then you probably will want to run a master branch instance that is much less stable and prone to errors. Until you can afford it, it’s probably not a good idea for developers to be spending a huge amount of time debugging in-progress features (which IIRC, firefish had a lot of those.)