Agree that IntelliTXT is obnoxious, but I honestly feel like things are trending better and the online ad industry is growing up. (And IntelliTXT is hardly new.) In the previous decade it seemed like auto-playing audio & video were pretty common... now they are definitely the exception (such ads violate a bunch of voluntary industry standards and are banned from many networks and publishers).
(Disclosure: I am co-founder of an ad-supported startup.)
I recognize this may be an unpopular opinion, but as companies get better at targeting ads and advertisers get better at measuring ROI, the result will be better ads that are more relevant to you.