No one* here can tell you (a) whether stalking can pre-empt the waitlist, or (b) if so, how often it happens. So no one can tell you the benefit of stalking, other than anecdotally saying "It worked for me."
There are plenty of people for whom it has worked. Likewise, there are plenty of people who have found the waitlist to be satisfactory.
Only you know how important getting this room is to you vs. what your time is worth. If it is that important, and it is worth it to spend the time, spend the time. It might pay off! If not, don't.
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*: At least, that assumes know one here has intimate knowledge of how the
DVC inventory control system actually works and is either not bound by an NDA or willing to violate it.