Ahhh, interesting! I literally only googled the problem earlier today. It seems venmo's site lied to me then. It quite literally said

"It is not possible to cancel a payment without the consent of the payee".

Aka, if i give you money and you say you don't want it, you can cancel the payment.

But on Amazon or Ebay, you pay me for an Xbox, I ship it, and 3 days later "IT'S BROKEN" and I lose all my profit + shipping fees

When I was selling hundreds of items per month, I would hold any Spanish name for 48 hours. The majority of Spanish named buyers were committing fraud.

Funny story is the first time my credit card number was stolen following the Target hack, it was used in a grocery store and a convenience store near Madrid.