Maria does make a very valid Point .... I was going to blast her for what appeared to be Virtue Signaling to the Poor Expats who can barely afford to have Service people Tend to them hand and foot ...
but as she says The Porter can be your friend or he can literally RAT you out or maybe even set you up ? So I would be careful with those Generous Tips.
And if you think thats not possible , Read up on what was happening at MANILA Airport ... they would SNEAK a Bullet into your Luggage and then proceed to shake you down. and Hard ... Not saying the same thing would happen on ARRIVAL in the DR .. but it does open that possibility .. $20 to me seems more like a BRIBE than a " thank you " for services . I think I will take my OWN Bags outside to the Car or Taxi. The Cart will do just fine .. but to each his own .
Security is more of a Concern, than Convenience ... although I have no problems flipping someone a Propina ..
Personally I always use a luggage porter to carry my two or three suitcases, and I always give him RD$ 500. And he's always happy with that. We're usually out of the airport in about 20 mins, so I figure that if everyone tips that way, the guy is going to make at least RD$ 1000 per hour. Nice work.
I always give some coins to those poor guys who pack bags at supermarkets (even if they don't carry them outside) and they always look surprised when someone tips them and they don't move.