Take note and remember of what Zelle's rules and regulation is with regards to online transactions. You might end up being called and questioned with your online activities once they detected some payments that might be suspicious to them. And also, apparently, using your credit/debit cards from your bank accounts already is giving your own information, no matter how they say they don't get your data. So it is really on your  choice and behalf if you would entrust your identity and bank info on that platform.