Announced today:

Ryanair has introduced a subscription which provides access to sales, free seats selection (selected seats) and travel insurance (when traveling on a Ryanair Group airline). Total cost is €79 p/y

Link: https://www.ryanair.com/ie/en/lp/explore/membership

Personally I don't quite see the value in it myself as (for example) the travel insurance won't be valid when flying other airlines and for the routes I tend to take easyJet is the only option so makes more sense for me to have easyJet plus.