&gt; some testing vendors use one-tailed tests (Visual Website Optimizer, Optimizely)<p>&gt; Most A&#x2F;B testing tools recommend terminating tests as soon as they show significance, even though that significance may very well be due to short-term bias. A little green indicator will pop up, as it does in Optimizely, and the marketer will turn the test off.<p>People pay brisk money for this?