A server option that allows players to join if they fill requirements such as:
- Unturned II total playtime is [less/greater than X]
- Having Steam Profile public [true/false]
- Owning the Unturned II DLC/Gamepass [true]
- Steam Account exists longer than [X days]
would probably require option 2 set to true to read the API
Those options are useful to prevent rulebreakers from joining a server with a second account after getting banned. Free-to-play games attract a lot of cheaters/hackers since they can just create new accounts and dont even have to spend money on it. Its also possible to create “beginner servers” where the majority of the players would be new to the game and wouldnt face really experienced players. There will always be smurfs but it does still help.