They have been testing with Optimizely since early 2012 to grow online readership.
The Guardian uses A/B testing across many of its webpages and properties.
Updated Lonely hearts on the dating website Guardian Soulmates have been targeted with sexually explicit spam emails after trolls abused leaked contact information.
Guardian News & Media, which runs the site, blamed a third-party tech supplier for the issue, which has since being resolved, the BBC reports.
Product managers like Kerstin Exner are encouraged to run A/B tests whenever possible, as long as a strong business case can be made for each experiment.
One property The Guardian optimizes frequently is its dating site, Soulmates.
If you are new to online dating or want to find out more about the online dating scene for professionals, then check out the Soulmates Blog for great tips, advice, and tips for the latest date spot locations.asked Guardian Soulmates for a comment but we're yet to hear back.® In a statement, Guardian News & Media apologised, and blamed the problem on "human error by one of our third party technology providers." In a statement, the publisher said: We can confirm we have received 27 enquiries from our members which show evidence of their email addresses used for their Soulmates account having been exposed.They drive a majority of their traffic directly from ads placed on The Guardian’s news pages.But while Kerstin found these ads performed well in terms of overall click-throughs, she noticed that the majority of these visitors were not converting into subscribers.Launched in 2004, Soulmates monetizes via paid monthly subscriptions that allow members to interact with other members.