[egeozcan]

I have uMatrix and uBlock. In my case it was uBlock blocking the ad, not uMatrix... or maybe I had whitelisted it before? Not sure.

edit: Okay, it's not blocked by default with uMatrix: https://i.imgur.com/B97lf35.png

[gorhill]

uBO can block with pattern-matching URLs of network requests and additionally cosmetic filtering (hide DOM elements), while uMatrix works strictly with hostname of network requests and types of resources.