I fly each week into the US. Flight schools are a dime a dozen and any joe soap US citizen that I speak to wouldn't look at aviation as a career as they make more money flopping burgers. Schools such as the aforementioned made tidy profits from selling what was effectively a "US" product at an inflated price to Europeans. In years gone by the exchange rates made this product extremely attractive. Add in cheaper petrol, nice weather and a general absence of landing fees and it was a win win for the student.
Given that analysts are now predicting exchange rate parity and worse in the next 12 months the screws will be turned so the EASA fees could well be the beginning of the end for some of these schools.