When I start a group, I sometimes require a RP Sample because I don't really want people who aren't very skilled in Role Play, to join a somewhat professional group RP. The only reason people do that is to keep, Non-Skilled at RP people to join. I have joined a few groups, like Unchained with over 300 members, that requires a RP sample. (Btw If you want to join, Whisper UncainedRP)