Tangentially, I wonder if anyone has experience with mixing a EQN booking with one that theoretically is not. I usually book individual nights contiguously. When I arrive they bundle them into a stay. What I was considering was after checking in, adding another night at the end, but using Chase travel so I could get the $50 discount. I assume I would not get credit for the last night, but figured maybe I could keep any upgrade and maybe they would not charge for breakfast.

Has anyone have a data point re adding days to an ongoing stay by booking via a 3rd party ?