That is how it use to be done, but things changed a couple years ago. With the IGT/OGT/VGTs they base it on the lowest category that you could have gotten with that rate. So an OGT would be based on a cat 10. Also, there is a chart that they use. It is dependent on the stateroom category, not the price you paid.
OK, I was asking about this on another thread and I checked for a few days and didn't see an answer. My old post on that other thread may have confused the OP. I was basically trying to figure it out because it seemed to good to be true!
So, just to make sure we all understand......We booked an IGT on the EBPC for $4,000 (that's with taxes, but let's use round numbers). Therefore, the lowest room we could get is an 11B (because they have to at least give us one that sleeps four). But let's say we get our confirmation and they have us in a 10A.
Then let's say that the day before we sail, I look online and see that an 11B is going for $4,500, a 10A is $5,500 and a verandah (don't know all the numbers) is $8,000. The math Disney would use to calculate our upgrade fee is $8,000 minus $4,500 (the current 11B rate) and then the 1/3 to 1/2 rule. The $4,500 being a bit more than we actually paid for IGT, but also being the current cost of the 11B stateroom we could have received. And the fact that we received a 10A basically doesn't factor in.
Again, if that's how they do it, that is a sweet deal. And, yes, I realize that it's rare for rooms to be available in every category and that most ships sail at full capacity.
Am I understanding the math part correctly?