Earlier quoted context omitted.
Yes, indeed. Now, does GA's sample actually have significant bias? If it does, then showing the practical effects should be easy for experts at a competing company, don't you too think so?
> Now, does GA's sample actually have significant bias? Yes it does. Both for the adblock https://backlinko.com/ad-blockers-users and the consent banner https://www.advance-metrics.com/en/blog/cookie-behaviour-stu...
Take the top graph on the first page: countries. I've worked at two places where I had insight into web access and logs and such. I shouldn't go into too much detail so I'll pick a different pair of neighbour countries: if France and Germany were target markets, the difference in ad blocker usage would not change any decisions. Germany has a higher share ad blockers, and because of that a graph comparing the two countries might be 3% away from reality, but 3% wouldn't affect any decision. 3% difference in flows of money might, but 3% on something that doesn't reflect money? Not a chance.