Google used to do this for me a lot. I'd search for a phrase, click on the first result - and while I'm clicking it, an ad would appear in its place and push th

Google used to do this for me a lot. I'd search for a phrase, click on the first result - and while I'm clicking it, an ad would appear in its place and push the first result down, directing my click on an ad instead. I have some suspicions that it was done that way on purpose.