Google was more aggressive than I expected. 17 new ad interests from a single session. By Day 1 it was already removing interests and replacing them. Not adding to your profile. Rewriting it. The control didn't move once in five days.

I built a Mac app (MirrorMask) that does this against your real profiles. Happy to answer questions about the experiment or methodology.

The strange thigs come on accounts that are on my working machines. All are on same IP range like other devices, the difference is the OS. All ads are different. Sometimes womans stuff, aliexpress, amazon. Without any logic.

Im coming from a small European country but all ads on working machines are american or chinese (english language). On other devices are in my language.

Any idea?