There is an Irish society of actuaries where qualified actuaries can complete their CPD requirements with. Increasingly Irish based companies are not wanting to pay membership fees for both the IFoA and the Irish society so since the Irish society has CPD events in Ireland and the fact that the Irish society has a greater focus on issues relevant in Ireland, many actuaries are choosing to just be a member of the Irish society. Student members still need to be a member of the IFoA in order to sit exams.
In addition to the above, Irish Revenue have changed rules - basically if a non student wants to by a member of 2 bodies, they only get tax relief on one of their subscriptions, - and there is no requirement to be a member so why would you keep your membership alive? Nothing to do with any anti IFoA agenda that you were hoping for
You might as well include that question in the next chain of emails you have with them - from reading your posts lately you have a lot of questions - so be best to email them and get an answer. Shouldn't be a concern of yours too much what happens in a country that you do not live in?
That doesn't make sense. IFoA losing money is not an irrelevance to people in the UK. It's already a very expensive qualification system.