Earlier quoted context omitted.
From what I recall of their website, they have an opt-in feature whereby the add-on can send them information about what ads are appearing on what pages and the like, and they anonymise and collate the data to sell it. For instance, you could buy a service off them to the effect of "what adverts are actually appearing on my website when Joe User loads it up?" And I believe I remember also seeing a statement to the ef…
Awesome, so their monetization strategy is to undermine the whole product and say "trust me"
Any browser add-on could be monitoring your entire on-line activity. Why the hell does that suddenly become a problem when one's up-front about what data they collect, when they collect it, and what they do with it?
And no, they don't say "trust me". As I mentioned in my first comment, they say "if you don't trust us, unpack the add-on and check the source yourself". Which you definitely can - I just did it myself to verify, and it looks like easy reading to me.