I think 375,000 passengers a year is an over-estimate. For a twice-daily service it's more likely they'd carry 200,000 passengers.
Ryanair's usual stance on these "subsidy" or "marketing support" deals is that they would be open and available to any carrier offering to do the same. So did Brit Air ask for such support or even had it been offered in the past.
Given that Ryanair now have a number of European bases, ie Charleroi, Hahn, Bergamo and Skavsta does anyone know how well they are doing in comparison to their Irish and UK bases - particularly on the routes which don't go to Ireland or the UK?