In the "user guide" it says it's a platform for math/stats PhDs, and describes a process for checking email addresses. It certainly gives the impression of unw

In the "user guide" it says it's a platform for math/stats PhDs, and describes a process for checking email addresses. It certainly gives the impression of unwelcome to people who are neither PhDs nor currently enrolled in a PhD program. If you want people who don't have and aren't trying to obtain a PhD to participate, I think you should say so explicitly.