People who never do any sort of blocking are the most valuable ad-targets, and hence get the highest bids when their views are auctioned. They get Toyota, Coke, and Downy ads.
Scam advertisers are bottom feeders and the "advertiser of last resort". Google doesn't really care that much about people with blank profiles, and why would they, these people use their services and contribute nothing back. I don't think Google is vindictive, but it just doesn't make business sense to put a lot of resources into cleaning up ads that pay google nothing and mostly go to people who temporarily disabled their ad-block.