Update. I just used the hotel remisse service (and they will pick up anyone, not just people for that hotel) just dropped me off at the airport. The trip that cost me US$40 from the airport to the hotel (using HVG, the taxi desk right at the airport) was just US$25 with this service for the exact same trip.
You can contact them via email or phone to pre-arrange a pick up:
Carlos Alberto Vela Ruiz
Servicios Ejecutivos VIP
[email protected]
mobile: 999-119-855