I once was part of a Roll20 GURPS beginners campaign. The stated intent of it was to get people into the game and give them a chance to try out the system.
The GM was actually quite versed in the whole ruleset, and did great at explaining things when asked about them most of the time. But they also, for some reason, insisted on introducing a bunch of custom-made content, etc. and 400 point characters (which, for all intents, practically forces you to make a superhuman characters with 14+ level atrributes rather than going for skills..).