Earlier quoted context omitted.
> Analytics isn't just about conversion. Analytics is about the entire product experience. ... which you can entirely do by analyzing web server logs. You dont need google for this, pushing your users (with violation of GDPR consent) into google monstrosity. Dont do that, I block every freaking google domain from cdns, fonts to analytics. But I don't block 1st party analytics. I have no reason to. I have visited your…
FWIW, there are many well known techniques for shipping data to GA regardless if you block it or not. Many integrate server-side for this reason (as you say - server logs are very rich), and client side is used supplementally. Some are using sneaky techniques to move requests through 1P domains. Adblockers make zero difference.
Just for an info, I have written a mitming proxy that takes care of those (cname cloaking) and a lot of other things, including fingerprinting, supercookies etc., with support for various blocklist (domain to adblock), js injection where the injected scripts are handled in same manner as blocklist (you can stockpile them and make rules), changing validity of cookies (to session cookies for instance), saves your data trough highly effective caching and even helps spying cdns save some bandwidth as they are mostly no longer visited. And yes, works as transparent proxy too (for router enforced usage). Imagine fully armored firefox for whole network, regardless of browser, freebsd,linux,windows,arm8. Working on cross platform gui, release soon.
So I might know a thing or two. ;)