aimoc - one can debate as to what sort of measure is important when talking about "number of passengers" - take your pick from below:
1) Number of non-refundable tickets sold. Unlike full-fare tickets on non-LCCs, those purchased from Ryanair, meaning MOL has your money whether you turn up to the airport or not. Furthermore, by setting the admin fees sufficiently high, MOL gets to keep the airport taxes if you don't show up, making you even more profitable
2) Number of passengers actually flown
3) Number of tickets sold at a non-trivial price. That ticket for 1 penny (including all extra fees and charges) counts as a ticket sold, but the revenue to Ryanair is on average negative since even if 1 passenger in 500 shows up, the overall cost of carrying these pax outweighs the direct revenue from those penny coins. One could thus argue that tickets sold for less than 5 euros should be ignored when comparing number of passengers.
It all depends on the purpose for which you use "number of passengers carried". If you want to show number of times people pull out their credit or debit card, then all ticket sales count. If you want to measure number of people who travelled, then only passengers flown counts. If you want to measure revenue for financial purposes, then only tickets for a non-trivial overall fare might be important. You have to consider what you wish to measure or compare.
As the misquoted saying goes - "Lies, damned lies, and statistics...."