In the forum I see many big scammers continue their work, their accounts only have red tags, on the other hand, I see many accounts getting banned for plagiarism.
So my question is now is the crime of plagiarism more offensive than scamming?

Both offenses are frowned upon in the forum but it seems that plagiarism has a greater punishment because the crime can be easily established. A scam is not a lesser crime but it is very difficult and sometimes expensive to investigate. I also think that people can easily accuse someone of scamming them which might not be true. Businesses might not go as planned and one party might claim that he has been scammed especially if he loses money. And in this forum business dealing is mostly based on trust that no legal document is signed that can be used as evidence. Maybe in the nearest future rules covering punishment for proven scam cases might be increased because some scams are preplanned.