into effect, all users who continued using the service after that date agree to be bound by the new documents. Current users have a 30 day window to "opt-out" of the arbitration clause and to revert to the prior version. After 30 days any current user who has not sent special "opt-out" notification must abide by the new terms. An email was circulated listing improved clarity for banned user data and legal processing, an updated cookie policy, and confirming MTCH Technology Services Limited as being responsible in the European Economic Area, the United Kingdom and Switzerland. In addition the Live Streaming Service was introduced, this includes agreement by OkCupid users to the Terms and Conditions of The Meet Group, Inc which allows for data to be shared between other dating sites and with other Meet Group users. This was silently removed in July, 2022. Reviews Despite being a platform designed to be less centered on physical appearance, OkCupid co-founder Christian Rudder stated in 2009 that the male OkCupid users who were rated most physically attractive by female OkCupid users received 11 times as many messages as the lowest-rated male users did, the medium-rated male users received about four times as many messages, and the one-third of female users who were rated most physically attractive by the male users received about two-thirds of all messages sent by male users. Additionally, a study published in the August 2018 edition of Science Advances by researchers at the University of Michigan and the Santa Fe Institute found that users of an unnamed, popular, and free online dating service in New York City, Boston, Chicago, and Seattle typically pursued potential partners ranked on average 25 percent more desirable than they were (as measured by the PageRank algorithm). Coupled with data released by the dating app Tinder showing that only 26 million of the 1.6 billion swipes that the app records per day actually result in matches (despite users spending on average about an hour and a half per day on the app), an article published in the December 2018 issue of The Atlantic concluded "Unless you are exceptionally good-looking, the thing online dating may be best at is sucking up large amounts of time." Experimenting on users In 2014, OkCupid revealed in a blog post that experiments were routinely conducted on OkCupid users. The site revealed that one experiment included removing users' profile pictures on