MailChimp’s hard lesson in freemium business model: spammers love it

The freemium business model, where you give away a service or app for free and charge a subscription fee to those who want premium features, has taken off everywhere. But Ben Chestnut, chief executive of the email marketing firm MailChimp, warns that the freemium model leads to a very unwanted side effect: a tripling of reported abuse cases.