I noticed that today on ryanair.com they're advertising free flights but the best I can come up with is 1p. 1p does not meet any definition of free that I know and when you add in the credit card surcharge for a return flight then free becomes £9.51

I've heard so many bad things about Ryanair that part of me wants to experience it myself just once so I might get a mate with an electron card to book the 1p fare because I just can't bring myself to giving that company any money (and 1p is close enough to zero for that purpose).

So are these 1p fares really the free ones or are they ones that are really free and so don't attract any credit card surcharges?

Is it legal to class 1p as free, is allowing an obscure card as Electron to pay fee free enough to allow them to consider the prices on display as all inclusive?