Avoid stealthmode. Users got banned during testing last year, the dev claim "this and that many days UD". Its still for sale, but will get you banned.
For the fun sake of if, i tried a 24h key, got beamed within a couple of hours by BE. Only played 1 match on a level 20 account. Stealthmode was a good cheat, but since the banwave their telegram/discord doesnt allow members to communicate openly. The only status of detection is their own claims, which obviously is bs.
And whatever crossly says about it being UD is bs. We both tested SM (internal test group) and got beamed. The dev/owner is just looking to grab cash at this point.