When SPAMfighter.com added a Facebook “Recommend” button to their sidebar, they ran a split test to measure the effect that the button had on their conversion rate. A conversion was counted when a visitor downloaded a free version of their SPAMfighter software.
Below are the two versions of the page that they tested. One version has the button at the bottom of their sidebar, and the other has no button at all. Click on the page thumbnails below to see the full-sized versions.
What percentage increase in conversion rate do you think resulted from the “Recommend” button? Vote below to find out the correct answer.
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