Simple Dick, There is no subsidy, there will be no subsidy, and the Technology is unproven.
But for some ADSB is just a good idea, in the main unlike you and me they don't own aircract, they rely on the good will of others to allow them to fly albiet through rental.
But the real truth is they won't have the expense of the CAR 35 orders, the non manufacturer of the airframe inspired modification to standards that will not comply with a U.S. C of A and significantly devalue the aircraft benchmarked against the Blue Book.
All rather sad really, people with no responsibility making imposts on people with responsibilty who substantially don't want this thrust upon them.