Reasonator is being used. One reason why it is used is because it is an option in the #Wikidata search results. This explains why it is used so much more in Polish than in Dutch. It is also used because it is increasingly informative. Just have a look at the page for Mahatma Gandhi for instance and check out the timeline..
What also contributes to the popularity of Reasonator is that more simple and obvious contributions are possible from within Reasonator.