Escalation of Legal Costs is a tactic that Ryanair uses to beat opponents into submission. Danny Fyne made refernce to this here:
Ryanair has a record of going to court over anything that they feel is claimed to be unfair criticism....... As they have very deep pockets, not many people can afford to dispute them when any allegations do arise, including myself here at PPRuNe, but it would appear that many people think PPRuNe is the only platform where they can at least raise their allegations.
But even as bloody minded as they are, they did not loose this court case in Dublin, they were slam dunked. How even they could justify spending the money on an appeal is beyond me.