This is much like a monopoly, which is illegal. Basically hes manipulating the economy which makes it hard for noobs to obtain common MvP cards. For example if theres 900 kiel cards in server and 1 person owns 850 and the other 50 are spread among random players, all the new players have to hope the 50 sell theirs for a decent price or buy the kiel that is overpriced from the guy that owns 850 of them.