Actually, SimpleManToo is correct. The extra 20% is from elite status not from the card itself. (Though having the card will provide you with at least Silver status.)

Also, if one stays enough to get Gold status, the bonus is bumped to 25%. Plat status provides a 50% bonus. So a Plat staying at a Marriott hotel could potentially receive as many as 20 pts/$ spent (10 pts base + 5 pts Plat elite + 5 pts from charging on Premier Marriott Visa).

There are 3 different Marriott branded Visa cards. Two of them only provide 3 pts/$ spent at Marriotts and one of them provides 5 pts/$. But all of them will give enough nights toward status to get one to at least Silver status.