I meant those who don't pay anything per trip e.g. those who have the Deutschlandticket.
They are not freeloaders and I'm not blaming them but the more they travel the greater the burden while they aren't paying more. As with any other unmetered X/month service, the service provider has to make sure there's enough capacity.
It was said that after the 9€ ticket experiment, they wanted to analyzed the performance and outcome of such a scheme and I _assume_ that this has been somehow calculated to not over burden the system. I have a 49€ ticket (company provided) but if I wanted to pay per trip I would pay less per month. I don’t think I am alone.