League Tiers. Every playtime milestone (e.g 50 hours overall playtime within the league), the league gets some more benefits (more player slots, league cosmetics) etc. 50 Hours - +1 member slot 100 Hours - +3 member slot 300 Hours - +5 member slot, + 2% experience multiplier. This would carry on until there's a max level (10k hrs playtime or something like that). This would give an actual merit to being in 'sweaty' leagues. If a player is AFK, their playtime wouldn't count.
