It became a very common thing recently that German politians are working together with companies which scan social media sites for posts with insults and file cease and desist orders with money penalities or taking it even further to court.
Check for Robert Habeck and Strack-Zimmermann for example which both served over 1000 of those earning hundreds of thousands euros.
The case with Thomas Vierhaus is even quite old but he apperently refused to pay and got a Strafbefehl now which he appealed.