If you use multi accounts to evade a ban, gain an edge (promo abuse, getting around bet limits, pretending to be 2 diff people in chat for tips/scams/rain) or do something they told you not to do, that's bad.
Otherwise, it's fine.
But thats not what they say. They say "we take multi accounting seriously" or something like that.
Also Dusan said something like " if you dont have multiple accounts there should be no problem" .