Obviously, I don't either. But in 2012, I was forced to switch reservations unless I used multiple e-mails. If you were doing that, you would not have gotten the pop-up. If you used the same e-mail or the reservations were tied into a hotel reservation, you would have gotten the pop-up.
People who are making multiple reservations - whether they later cancel them or not - are circumventing the system. That's going to continue.
Just to test the theory, I went to the website to book some reservations. The interface has obviously changed to tie into MM+. The system crashed on me twice while I tried to set up a lunch reservation. Just sayin'.
Under the new system, there is no pop-up. The system ties the reservations to your MM+ account. Once you have a lunch reservation, it won't let you search availability for another one for that day. The obvious workaround is to open another account. But then, that has always been the work around back when they had the pop-up. So really, not much of a change.