I actually went through exactly this with Dropbox a couple weeks ago. It took me two tries, the first time I mis-read / fell into one of the dark patterns. I'd made up my mind long before I ever went to the website to cancel and all this did was make me grumpy and justify my decision even more. Clearly it adds to their retention numbers somewhere or it would be dropped, however I will not use dropbox again in the face of such blatant disrespect. It was a great service, but with so many other options out there I have no need to use one that thinks I need to be tricked in to staying.