I'm generally not inclined to fully whitelist anyplace because even if everything it loads today is safe, who's to say what's going to be loaded after the site gets hacked. That said, I tried to go through and do some allowing of requests and scripts for places I recognized, including whitelisting the site in Ghostery to keep it from interfering. After adding 19 separate exceptions in uMatrix for both whole domains a…
The reason blocking is so easy and works so well is because everyone got lazy. Publishers want ads but don't want to actually do the job of selling them; ads used to be free money, and this is coming to an end. Ads from their own domain would be a little harder to block, especially because blocking would have to be done on a page-by-page basis (or at least, website-by-website).
I see, of course, that I'm likely not representing the majority of adblock users.