I've been playing for 3 days now and so far I'm not banned yet. Still waiting for the newbie rankings to end before I go crazy but I've been abusing currency never decrease from time to time. I'm avoiding reaching top 20 as much as I can and just doing completion on other stages and I also haven't interacted with any other players like typing in chat, doing arena, adding friends, and joining a guild. I think if I keep this up I can eventually survive the seven days or longer.