What took them so long?
Dodgy "download" button-ads have been a widely acknowledged blight on the web for years.
As a website owner, I actually removed Google ad panes completely from pages of mine which offer downloads of applets I've written, because I was worried users would be misled by the dodgy download button-ads (which were more prominent than my own links) and I didn't want the reputational damage.
In the last few days I've been seeing "driver update (recommended)" ads overlaying youtube videos.
Sort it out!