Nice Jam,
As I've said many times before, I've no axe to grind with HUY, I just don't think the catchment area is big enough to sustain such flights, especially with DSA down the road.
Under the low cost terms & conditions which FR tell airports like HUY they will operate under, FR will not be paying HUY anything for at least 6 months.
After this they will only pay a minimal charge per head and probably very low or no landing fees at all.
Additionally, when HUY to start charging FR, there will almost certainly be a "turn around time penalty clause", whereby if the aircraft isn't turned around within the time specified (usually 20mins), FR don't pay anything at all.
Dublin will be popular, but on the all round trip, thats nearly 200 out of the 280 or so seats that have to be filled EVERY day it operates to make it worthwhile for FR to operate the service, and in the interim, HUY get little or no income from it.
Cosmetically it looks good, but it wouldn't stand the scrutiny of the Dragons Den.