been playing for 2 weeks now still no banned, I also get gem at summon mercenary and mission completion, by summoning mercenary for 30 times then I will redeem the completion reward for summoning for 30 times, before claiming I will set the gem multiplier to 100 so I can get the gem back.
I maintain the gem into 1 - 5k, because I use gem for enchanting mostly. so I don't need too much.
I get gold at dungeon I multiply by 5 only I don't exceed too much.
I only use exp multiplayer when the mission ask me to meet certain levels. like if needed to be level 23 before doing mission, etc.
I'm Level 55, still no banned I also playing Co-Op without guild and active at public.