Yes, they allow certain “non-obtrusive” ads by default. Some people might be fine with this, but it should absolutely be opt-in, and their deal with an ad company is the only reason it’s the default.

A tale of 3 adblockers

ABP allows “acceptable” ads that are acceptable insofar as they meet certain standards one of which is paying them money effectively renting your eyeballs to advertisers.

Ublock Origin: A powerful and performant ad blocker by its creator

Ublock. After the above dev tried to pass the torch to the loser who now controls this he instantly edited information removing all information about the person who actually created it and fund raise off it to the point where the original dev renamed his fork of his own work Ublock origin after it was taken down on behalf of the scumbag who now runs ublock.

In short there is no reason to use anything but Ublock origin