I don't think 100,000 is a realistic number. 50,000 will be a big success IMHO. My projection is around 20,000 annual subscriptions.
Don't see any of those guys paying for the game. Mitsos is welcomed at my house to watch the game. Frankly I don't think a lot fans of other teams will go for PAOK TV when we play their team. They will more likely see the game at a kafenio or watch it illegally on some shitty stream.