Comment by pyrale

No, they will simply ask internet providers to stop providing access to X to their users, and local DNSes (usually associated to these ISPs) to stop providing IPs associated with Twitter. This is nothing new, there's decades of prior art on copyright grounds.

Some edgy kids may use a VPN or something to bypass the ban, but 95% of people will simply move on to the next usable thing.

Another route is to tell financial institutions that payments to X must not be processed. That will immediately shut down advertising revenue from German companies, which will mean Germans will become less profitable users for X.

So... Yeah, Twitter may flout the ban, some users too, but most users and, more importantly, German banks won't.