This is how I see it: A trader gives money to admins before being able to do any trades, and in case that trader ever goes evil and decides to scam, the money that trader gave to the admins will be used to refund the people the trader scammed
This is how I respond: Pointless, let's say I give Liz $100, and I scam someone $200, then Liz gives that person my $100 that I gave her, they still lose $100, now let's say I give Liz $100, and I scam $100, and Liz refunds the user their full $100, I still gave Liz $100 and eventually later on in the future I scam $100 meanwhile I could have just had Liz give it back, therefore I get no profit + a perma ban.