Well, first of all, the article is just a business promotion trying to sell some AB test. "Note: If you’d like to run AB tests like this to help increase your ecommerce site’s conversion rate, you can learn about working with us here."
Secondly, it's very obvious that the user would click more on something that they can actually see rather than something they don't, how they are supposed to click on a button that can't see.
Stick on mobile should be mandatory, generally speaking of course.
Well, first of all, the article is just a business promotion trying to sell some AB test. "Note: If you’d like to run AB tests like this to help increase your ecommerce site’s conversion rate, you can learn about working with us here."
Secondly, it's very obvious that the user would click more on something that they can actually see rather than something they don't, how they are supposed to click on a button that can't see.
Stick on mobile should be mandatory, generally speaking of course.