Venmo currently accounts for about 39 percent of PayPal’s digital p2p payments business; PayPal and Venmo only charge users a fee when they use their credit cards, though Venmo has started to diversify their offerings to help PayPal’s bottom line; Venmo has expanded Pay with Venmo and started a instant cashout service which both have fees associated with them; they have seen fast adoption with both and the hopes are that a breakthrough year is coming soon. Source.