I assume you setup your airports for Dings from PVD. If that is your only airport, add a few more like MCO, TPA, BOS, MHT, and BDL so you can see the Dings for your area. You can add more airports by following the info link on SWA as they note om the Dings webpage:
"The offers listed above are targeted to the airport you selected during registration.
To modify your selection visit Update Registration. You may select up to 10 airports for the "My Airports" section."
I haven't seen PVD Dings for a few weeks now. I do miss them on occasion, so my experiences aren't absolute. I see very few for BOS too, and MHT Dings are always to places like Milwaukee, so go figure!!