This behavior is clearly intended to confuse the user, with the effect of making inattentive users think that they aren't on Bing. On mobile, you never see the

This behavior is clearly intended to confuse the user, with the effect of making inattentive users think that they aren't on Bing. On mobile, you never see the Bing header due to the auto scrolling behavior. If any other company tried to pull this, I imagine that they would be blocklisted by Google.