You registered multiple accounts to steal the auction from real users and then refused to pay for your bid, asking us to send you the money for free and you would post good publicity here.
Since we denied your request for free money you decided to call us a ponzi scheme....
Here is the proof:
https://imgur.com/nQFzeIGSo, now, please crawl back under the rock you just came from.
I still trust your website, but giving away free credits on signup would always lead to this, this is security 101.
I suggest you guys stop the auctions and get some sort of 2FA on signup in place, like SMS or whatever, that way this will be a non issue.
Also, ignore the troll, I've seen him before on other threads trolling people, so just ignore him and fix the vulnerability.