many do, but uBlock Origin does not. Ad Block, Ad Block Plus and uBlock all allow advertisers who pay them. uBlock Origin so far has not sold out, and should be the only one people suggest.
Although Mozilla has had it's own questionable stuff going on, I still believe in the Mozilla organization. We need browser engine diversity, and with Microsoft Titan/Edge engine going away, the only alternative to Blink/Webkit variants is Gecko (I wish Microsoft would just open source their Edge engine).
I honestly don't want all that shit in the core of the browser. They should be extensions, so you can take the things you want. It's why Jenkins seems like crap when you first use it compared to other build tools, until you leverage the ecosystem of Jenkins plugins.
What makes an extension easier to circumvent?
Your second sentence is true for adblock plus, but not ublock origin
Because ad blockers are just add-ons, they can be circumvented. Also, many ad blockers allow advertisers to pay them to allow their ads to get through: https://webcache.googleusercontent.com/search?q=cache:G3lu90...