I suspect multi accounts and using them to support one of your own teams is viewed as not cheating by Nordeus because of a couple of things
1. Makes the number of T11 players artificially higher...looks good in stats and for prospective advertisers.
2. Possibility that people might buy more tokens to 'bolster up' these sub accounts.

So , Nordeus allow this to happen for cynical commercial reasons.....and don't look at the morality of it......