I was doing a bit of research through EF on the fare codes for these fares. To me it appears they all book into "O". Even the classic fare when booked for something like JFK-BCN matches the fare rules exactly as shown on EF. The base fare jumps about $80, the change fee becomes $145 and you still earn zero miles in programs like UA.
The cheapest "U" fare (that would earn 50% in UA) has a base fare of $132. However, I have no idea how to force book that fare.
So bottom line...I believe these all book as "O" fares and will earn miles accordingly in the *A programs.
-RM