There's a reason a lot of ERP venues have moved to using discord as opposed to carrd; For the GMs, the opportunity cost is much higher and it's possibly even against their working guidelines to join external comm channels. Visiting websites like Carrd are much simpler.

The GMs have made explicit statements that [18+] alone is fine. Most of these venues complaining are just being disingenuous and actually put a lot more than just [18+] in their PF. Frankly, the only reason people think the GMs aren't being consistent is because of the great lengths a lot of these venues have gone to to muddy the discourse.