Fwiw, I've been using Firefox for 20+ years, I hate ads with passion and yet I never heard of your add-on until just now. I don't remember what I've used befor

Fwiw, I've been using Firefox for 20+ years, I hate ads with passion and yet I never heard of your add-on until just now. I don't remember what I've used before uBlock Origin, but since its appearance it's basically solved the ad blocking on Firefox and became the de-facto standard for the browser. You probably lost all your users to it, rather that they all stopped using FF.