Umm... I've made numerous explanation regarding their [much regretably] call for investigation and trigger for final verdict. If I may explain and repeat, the "multi-acc" is a blanket statement they use to ask you to write to compliance, of whom shall investigate your account and the situation that triggered their flags.

Let's say that upon investigation, they found that you're indeed have breached a ToS, be it arbing, value bet, accessing from restricted territory, multi-acc, bypassing limitation, bypassing self-exclusion, or other things, they will come with AML message for their final findings.