They have a paid ad-free option in Europe. Nobody pays for it at all. Same with every company ever that does that (YouTube, Reddit - this is a tiny fraction of their customers).

Preventing them from blocking adblockers is effectively the same thing as banning ads in that it destroys revenue. Remember that that would impact all parts of the internet, even the companies without the resources of Meta. So maybe a company the scale of Meta weathers a policy like this - but many smaller advertising based businesses would not. So effectively, you would be driving even more consolidation of power in the industry and the acceleration of the decline of the open internet.

Also - no ads on marketplace? I personally do like using marketplace vs the alternative (Craigslist), and personally I would prefer that stays available for me to use (and for free).