Right now, I don't believe that things are set up to do beta on the regular site, but I believe being able to have a set of users on the main site who are set to be able to switch beta-mode off and on (similar or the same as the way the parent project does it) is planned for the future. So the capability is technically feasible, though I can't speak to whether the owners would think having paid entry into beta testing would be desirable.