Normally, as per the close vote aging policy on normal SE sites, the oldest close vote on a post is invalidated if no more close votes have been cast less than four days after it was cast.
The first action I take when I see an example question that doesn't belong is to vote to close it. However, four days later, most of the time I see that my close vote has disappeared. Not many people vote to close example questions, and I think so because we have no close vote review queue. I thus have to flag the question for moderator attention and say that it should be closed and that my close vote expired a while ago.
Additionally, in my opinion, most example questions that are closed are closed solely by moderator action and not by five users, save maybe for migration of off-topic votes to close votes.
Therefore, I propose that we should either lengthen the "aging" period of close votes on example questions or not age such close votes at all.