[dymk]

Very, very probably only to declutter their screen. Does the survey collect intent about why they install it?

I doubt anywhere near 26% block ads because of tracking. I doubt even 1% if users even understand what tracking means.

[Skunkleton]

I doubt that even 1% of internet users understand the extent of the PII that is collected. I would guess if the general public understood how all this worked, there would be many more people who objected to the practice.

[tgsovlerkhgsel]

Many of them probably also didn't set the ad blocker up themselves - they have tech-savvy relatives handle their computer stuff, and those tech-savvy relatives have realized that fewer ads means fewer malicious social engineering ads means less malware to remove during the next visit.