I know it's not the same issue, and the creds obviously came from somewhere else, but the amount of fishy reports I found just searching them here on Hacker News means I will never go near them.
The likely cause for their ban is going to be KYC getting around to review and money laundering regs/insurers demanding a certain course of action - cessation and seizure, possibly a report to relevant LE.
Platforms like eBay and upwork - anything where there’s a transfer of money between two third parties - have an enormous duty of responsibility around laundering and fraud, and even the slightest suspicion will result in a ban.