I've always gotten the 10 points per dollar at MVC.
It seems to me that at the Maui Ocean Club, I was not able to charge a meal at an on-site restaurant back to my room, so that didn't count as a "qualifying charge." Every other MVC location, that hasn't been a problem.
As far as I know, the only two brands that offer 5 points per dollar are TownePlace Suites and Residence Inn.
Not sure if you're speaking of say...paying your MVCI annual maintenance fees on your Marriott Visa credit card? There you will receive a 5 points per $1 spent.
But as others have said, MVCI resorts are 10 points per $1 spent on site and charged to your room/villa. And if you have your Marriott Visa Credit card as the paying vehicle - look for (depending on your "status" level) a bump of additional points. I love points...thus the screen name.