Third party escrow, if you explicitly used one. There's no free lunch.

And now you have invented Visa and MasterCard again.

Rather a dissociated escrowing from payment processing.

When you go to your local restaurant, do groceries you are paying a few percentage in tax for using you card.

Platforms online already act as escrow anyway. PayPal, Stripe, act as escrow..yes they take a percentage, but that's more granted for these cases.