Don't they have the candidates pay €55 euro for the online test? This is what I was told or read somewhere a couple of weeks ago. Now imagine how many people can do the online test per day compared to the maximum number of 12 candidates they host per day? Quite a lot. And I am sure they do still invite at least 8 candidates every day.
Ryanair are in trouble also with trainers, many have left and still are leaving and lots of cadets are in the pipeline. Admittedly, it is not as bad as it used to be a year ago or so, but still they are not in a comfortable position.