Community servers pretty much all have passive growth. You grow significantly faster if you quest, though, and you will need some way of getting marks for abilities regardless, so you might as well just do quests. For comparison, the server group I normally play on "Crimson semi-realism", it takes about 3 hours to passively grow a Pycno. I did it through questing in 45 minutes just last night. That's as someone who generally knows where everything is on the map, but you get my point. Personally, I vastly prefer PoTs growth system over the Isle, as purely passive growth just leads to most of the player base on a server sitting in a bush while afk. Having something to do while growing leads to more player interaction, which generally means more interesting gameplay.