I was wondering if this is true. It is! Take a look:
Here's ABP's policy on "acceptable ads":
https://adblockplus.org/en/acceptable-ads
From there, you can find the "acceptable ads" whitelist:
https://easylist-downloads.adblockplus.org/exceptionrules.tx...
And indeed, PageFair has a few domains listed. Fascinatingly, there's also a link to a forum thread where the whitelist was requested:
https://adblockplus.org/forum/viewtopic.php?f=12&t=20718
That thread links to a page that uses PageFair. After enabling a bunch of JavaScript domains (what, you're still not running NoScript?), an ad does indeed show up:
http://forums.utopia-game.com/forumdisplay.php?1583-Suggesti...
Rather hilariously, the ad is for a "Free Mp4 Player" and links to Ask.com or something. If this is PageFair's idea of the future of quality advertising, I don't think their company is long for this world.