In A/B testing, the "middle of the road" option was unsuccessful
To get an initial read, we tested a version of option B (Banner with a CTA) on our existing payment page. We chose this option because it was a relatively small lift for engineering and we thought it would give us a good idea of how adding another option to the page would affect conversion, as well as indicating user interest.
Ultimately, however, the banner got really low engagement and did not increase or decrease net revenue, so we ended up killing the test. Through user testing, we learned that most users were skipping right past the banner. The users that did see the banner found it confusing. They said it looked kind of like an ad and there was no clarity around what would happen if they did hit the CTA.