Weird situation. Such rule about powerleveling if you received goods from player who left game - exist,But... this thread by lososerg is not pinned anywhere nor rules page lead to informations about it. If amount of received goods doesn't exceed threshold by your level it should be just warning to you about such case and they should bring back
this thread to pinned (come on,we still have old useless threads pinned like forum downtime,compensation quest from summer 2018...) or merged with any actual pinned thread containing rules. This is pure stupidity to jail for smth that not discribed in official sources and you have to know how to dig it out.