Isn’t there a saying about this? “Leopards ate my face” or something like that?

“Leopards at my face” comes from claiming that your face would not get eaten while advocating for leopards eating faces.

If you would use it in the context of ads, it would be more along the lines of claiming you will not get ads because you are “special” while the thing just straight up says it will serve you ads.

I don’t think the thing is advertised as something to serve you ads, so it’s not the same.