Only commercial thoughts behind a tweet are not chic, says Domburg. There is, however, a Utrecht mayor who dares to do so. At least, that’s what you would say at first glance. Danny de Vries van Oudewater has been mayor since November 2020, but earlier that year he published a book about the fireworks disaster in Enschede, which he witnessed. A message, or ‘Pinned’, promoting the book has been pinned to his Twitter profile.