I did a quick network analysis of the
DVC website and just when the site came back up they did some massive calls to a website called clicktale.net. It seems to be a tool or company who specializes in user behavior, they even offer session replays. I assume that means that whatever we do or click on DVC can later on replay it.
Guess that could be a way to catch those (if any) who uses a bot to book.
however in the last 20min or so the calls have disappeared.
I therefore assume that the maintenance was due to the implementation of this - maybe it will only be active during the early morning hours like 7-9am.