I set up a Venmo account and understand that it is a popular way for young internet users to transfer money online.
Venmo charges 3% to send money from a credit card and some debit cards with a credit card logo (like mine). Other methods are cheaper or free. Of the dozens of online banking systems I’ve used for myself and others, this 3% fee appears to be the most expensive.
It might be possible to reduce or eliminate the fees by connecting directly to a bank account with an account number and routing number.