Bitmixcoin.io did the same thing on this forum. They put 5 bitcoin into escrow with our user - zazarb. Once they gained some trust, they redeemed their escrowed 5 bitcoin and then scammed people, one person was scammed with 16 bitcoin. So, I wouldn't call that a good model.
I don't think the OP is bright enough to copy a scam. He claims his site will not require registration, and he claims he will figure out dispute resolution with no registration.
This is not a pre-planned scam using a known method like a ponzi. This is just an idiot who doesn't understand how other idiots scam.
I wouldn't use offensive words towards him but I really don't like what he does. You know what's the real problem? People think that by buying some scripts similar of PayPal, Binance or even by building a similar one (a little bit similar, maybe 0.001%), they will be able to start a real business and become the opponent of these companies.
In this case, this man thinks that he will build a script, sit at home and will wait for others to transfer and then judge by his mind who is true and who - wrong. That's not a business and it has no future to my mind.