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By using Cname uncloaking that uBlockOrigin can do on Firefox. It should see that the real domain is Google Tag Manager.

I think the article mentions that Google recommends against using Cname for this, and using A records instead.

> Google recommends against using Cname for this

So use Cname? :D

Sites want the ads to get through, right? So they’re going to do the thing that makes that happen: A records.