Bing Testing Hiding Ads Labels After Domain
Briefly

Bing is at it again: another test of a barely visible ad label. This time they place it right behind the domain name. An unusual position combined with a light gray color that will most likely cause many people to mistake it for an organic result. Shady.
This is not as bad as some previous tests, like some of the most invisible ad labels I've seen before. And those image search ad labels.
Again, if Google did this, this would cause such a stir and rightfully so.
Shameem Adhikarath spotted Bing testing a line separator between a search ad and organic result.
Read at Search Engine Roundtable
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