BehindTheOverlay is an extension that gets rid of them.
BehindTheOverlay works similar to something like AdBlock, but it doesn’t need all the horsepower to run.
BehindTheOverlay| Chrome Web Store viaThe Next Web
BehindTheOverlay Instantly Removes Annoying Overlays from Web Pages
Chrome: The transparent popup-style overlays that sites occasionally use to block content and require you to wait for an ad to play, sign up for a new
