I misspoke. It appears they do. Nonetheless, six months immersed in online marketing courses has taught me that nobody is advocating any other kind of advertising at the moment which tends to indicate that they're still the most favored marketing option. Adblock works by comparing a LUT back in server-land with the page your browser sees. If it sees "ad" it tells your browser not to load it. This has caused Adblock to actually run slower than non-blocked browsers because of the proliferation of iFrames - if you've got six iFrames on your page, Adblock needs to make 6 calls to Adblock's servers. If each one of those iFrames can load a millisecond faster than Adblock can get a response, your page gets served six milliseconds slower with Adblock than without and the difference is cumulative. Adblock doesn't always work on targeted ads because there's nothing requiring Facebook to tell ABP that such and such is an ad.
It's the LUTs that kill you.