A charity group has reportedly unwittingly used a vulnerability in Paypal's Venmo service to spam users, and perform a DoS attack on it's own network. waterislife.com reportedly used the loophole to automatically send 1 cent to a person every time they used the service to purchase products online, with one example message stating "“1 cent can’t buy you pizza. But for just 3 cents, you can buy someone clean water for a day.” There is no current restriction on the number of successive requests allowed by a single user, leaving one to expect other mass advertisers will quickly follow suit. Venmo has yet to offer word as to whether imitating the mass spam transaction service ChangeTip will be considered a bug or a feature. WaterIsLife did not disclose how much the campaign cost them to run, but reportedly received $400 USD in donations on the first day.