Ayroplane:
A hugely successful airline with almost 80m passengers is the "least popular"?
You know, my favorite restaurant doesn't serve miilions of tiny, dry hamburgers per year, but still I prefer it many times over the golden arcs.
So maybe Ryanair and them do have this in comon. You get it because an alternative is either not available or too expensive.
But once you're done with either, you feel like ****, and swear to yourself "never again".