Yeah I've used cryptothrift to sell a few bitcoin for paypal, even with escrow you still run the risk of chargebacks in the future. Fingers crossed it hasn't happened to any my transactions on there so far. It's a decent marketplace, kind of reminds me of Bitmit.
That's true. But considering you can edit reviews of users at anytime, it appears that for the sellers with hundreds of transactions, they have never once issued a chargeback since nobody has edited a review stating that they've been scammed.