After this week I will have a free night certificate from the current promotion. The certificate is good for only category 1-4 hotels but I am planning on staying in a category 5 hotel in July. I don't have any other personal hotel stays planned for the rest of the year so I would like to use the certificate for that stay. Is there any way that Marriott would let me use the certificate plus some points for a free night? A category 4 hotel is 20,000 points for a free night and a category 5 is 25,000 so I don't see why I couldn't get that to happen (at least mathematically).