Since when? I fly in/out monthly and I have never had an issue getting an Uber. The only trick is that they do the pickups upstairs at departures in front of JetBlue, not down at arrivals. Your correct that the fare is ridiculously low, usually less than 1000 pesos so just tip them another 500 pesos if there isn't any nonsense along the way. It's way easier than dealing with the Taxi mafia downstairs.