Please let a representative come in and bring proof. His username is Iqojahuwum291
I'll tag @Kirito89 here, he is a support member of Duckdice.io.
After posting on trust pilot they respond he was 100% arbitrage betting.
I also recently learnt about the term "arbitrage betting" from a similar case not so long ago, from what i understand, to do arbitrage betting, you have to do it in two or more casinos, so how can a casino detect arbitrage betting. Hopefully their support member will show up and say something about this.