I read a lot. Including this site :
https://migracion.gob.do/noticias/
They have never to my knowledge deported anyone from Cabarete or Sosua that is an illegal overstayer of a tourist card.
The government simply does not care how long people from tourist card countries stay, drive, work, etc..
The euphimism "illegal" means only Haitians to the DR government. Some might think this is correct and fair. I am not one of those people.
Once cannot deny they do spend some money, but that does not make it right.