'Many' certainly doesn't = 'vast majority' (your words, not mine). But it is certainly more than 'a few'
Opinion based on my observations at many ticket gates in checking that pax are being treated fairly, along with observations made while travelling in Europe. Far more try it on, it's a fact that we need to accept, educate that, in fact, one does need to pay, and move on in a better place.
It means though that a ticket inspector is readily available at the time of the delay to stamp the ticket if not previously seen and not engaged in safety critical business.
Or at any time until one alights, or at the alighting station.