OK but there is a different definition to “they add more rooms” phrase that booking CM use.
They “release“ more rooms to their inventory at later dates. The total number of rooms isn’t going up and down but the rooms they are given to sell does. Same pool, different distribution. Some go to Orbitz, groups of various sorts, for DVC some aren’t given over to cash till later. Lots of reasons rooms come and go from inventory. There are not rooms that are CL today and nonCL tomorrow. The only resort that does that for certain is WL. Now, I do have a theory that GDT could do that, not add on like WL but make a room CL on one trip and not the other. The total inventory of CL rooms may be fixed, just which rooms get CL access may vary. Totally my theory though, no true knowledge.
I do have 100% confirmation that BWI has a fixed and stationary number of rooms with access to CL. Just talked to the CL manager last night about it as we were lamenting how we haven’t found a room here for our April trip yet. 65 if my memory is correct. That counts all the rooms on the 4th floor, the cottages, the deluxe rooms on 3rd floor (maybe others too, I forget) and their suites.