I don't have a Marriot, We have Vistana which is a Sheraton property. We have had it for years, they have been trying to convert us away from having a week a year to a points system. We can pick/trade our weeks, while the points system places different values on each week. Your yearly allotment may not be enough for a prime week, but I can get that same week since I traded in my week. My advice, take the pitch, they will be begging but ultimately you can find people unloading them on Time share Users Group (I think its itug.com) or something like that. There are plenty for sale, owner to public, no brokers. There is even an area that allows you to trade or rent unused ones.
Good luck