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In this experiment, the three pricing plans were condensed into a single recommended plan (annual), with a secondary option to choose the monthly plan.

In this experiment, 4 things were adjusted in the variation: the highest pricing plan was shifted to the left, it was set as the default one, the recommendation was also adjusted to point to the highest plan, and one benefit from the lowest plan was removed (customer support).

In this experiment, two pricing plans were inverted to show the most expensive plan first (in the variation).

This test deprioritized the free option (kostenlos) of cancelling a contract. It did so by placing it under the paid options as small text link / radio option.

In 2012 a Microsoft employee working on Bing had an idea about changing the way the search engine displayed ad headlines. Developing it wouldn’t require much effort—just a few days of an engineer’s time—but it was one of hundreds of ideas proposed, and the program managers deemed it a low priority. So it languished for more than six months, until an engineer, who saw that the cost of writing the code for it would be small, launched a simple online controlled experiment—an A/B test—to assess its impact. Within hours the new headline variation was producing abnormally high revenue, triggering a “too good to be true” alert.

HBR, September–October 2017 Issue, https://hbr.org/2017/09/the-surprising-power-of-online-experiments

Note: This experiment was a solid success and replicated multiple times over a period of months. It worked at Bing and had a profound influence. The only reason why we atributed a 0.25 point (a "Maybe") was because we don't have the exact sample size and conversion data.

In this experiment, the plans were sorted by the most expensive first, left to right (variation).

This test simply ordered the pricing plans from highest to most expensive. Overall sales decreased by an insignificant -1% with a possible +14% increase to the most expensive plan. The net effect was an insignificant 0.9% increase the the premium plans.

VWO.com published this test which removed two coupon fields on a shopping cart: a gift card code and a special offer code.

Kyle's team changed a donation form for the Barack Obama 2012 campaign from a single step to a 4 step one. The 4 steps were: amount, personal information, billing information and occupation/employer.

"Our plan was to separate the field groups into four smaller steps so that users did not feel overwhelmed by the length of the form." - Kyle Rush