I like the website!<p>There is no “testing” going on here, unfortunately. You’re just taking turns placing users in the treatment or control group, arbitrarily, depending on when they visit the page. How can you measure any treatment effect when everyone is part of either group?<p>I guess you could try something like switchback testing, but I’m not convinced visits to the average Twitter profile will yield enough samples.<p>I think it’s a well-executed idea, but I don’t think it’s fair to sell results under the guise of statistical validity when they don’t appear to have that. (although it’s just Twitter profiles, not eg medical treatment, so no real harm done)