PM some users who are not currently participating in that voting thread, I think it will save you more time to get at least 200 votes from different users.
The forum also raised user awareness after the news section was announced about this vote, so maybe PMing to some users would also help a lot. This is just a suggestion, you decide.
Why would he do that? Honestly, if someone sends me PM about something like this, I would be really annoyed and probably wouldn't even vote, even if I initially planned to. Additionally, threads in Meta and Reputation are constantly close to the top of the boards so anyone that is even remotely interested in voting will eventually see it.