Product Layer is a crowd-sourced product information API that lets you retrieve basic product information by scanning barcodes with your iPhone. So they started a campaign trying to find developers that are interested in this project. They started with a single banner (banner1) but after receiving some feedback about the text, they tried 2 other banners (banner2 and banner3). See them all below: CTR results Banner 1 20,625 impressions 59 clicks 0,29% CTR Banner 2 14,538 impressions 38 clicks 0,26% CTR Banner 3 14,574 impressions 26 clicks 0.18% CTR Judging from this, the first banner “something awesome is coming” was
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