[Festro]

I've not seen this before. Looks more like visual artefacting from a graphics processing error to me on first glance.

Where was this specific ad? Might try to find one in the wild myself?

If it is a QR code it seems like maybe some kind of proprietary watermarking tech to track ads for some very specific purpose. My phone either can't lock onto it or can't read it.

[yeahdef]

I see them all the time. Here’s an example on drudgereport. https://imgur.com/a/hOl9x2m

I am using an iPhone 13 browsing via chrome. iOS 17.0

[yeahdef]

Also occurs in safari