I did a count. It may be off by a little bit now, but it's probably close. Roll20 has 176 systems that are possible to select from for recruitment purposes. Of those, there are 83 systems which are currently recruiting . Of those, 8 of those systems are paid only. That's still a LOT of systems that people might be interested in playing, but probably wouldn't search for. Giving players the option to filter out the more popular systems would let those smaller systems attract more players. I would consider that to be healthier for the platform.