Please pardon me for saying this but I don't believe this should make anyone feel bad about their purchase. In fact, I don't think it is a very good idea in general to base how you feel about your own stuff upon whether or not you have more than others. There will always be someone with more or with a better deal. Make a decsion based on your wants and needs and then enjoy.
The reality is that these lucky few who have taken advantage of a good deal and got upgraded do not have things "better off" than a true DVC owner. My DVC stays in a 2BR cost me roughly the price of a value. DVC is a long term purchase, these sales events are a very limited, singular event, not to mention that surely only a lucky few got upgraded. Plus, they bring in fresh money and owners to DVC resorts which helps us all out as a profitable DVC is what we all want.