The thinking is that Google tracks keywords + clicks, and if people search for "keyword" and aren't satisfied with the info on domain1, domain2 and domain3 (demonstrated by clicking on the next result) but are satisfied after visiting example.tld (demonstrated by not clicking on any other results), Google will rank example.tld higher.

It's not cheap, and I consider it to be more Voodoo than proven fact, and most SEO people are generally more the religious type than the scientist, so they won't run tests. They do it, see that they rank well and continue to do it. I've suggested sacrificing chickens, but nobody listens to me (or they won't admit that they do).

>And then use the information from this button to lower the search score for any domain with high level of users willing to ignore a domain completely.

Its trivial to game and becomes just another service for SEO consultants to sell ie having some mix of botfarms and humans in low cost of living countries flag your competitors sites.