Thanks for keeping this list in the loop. The topic of writing contests with a focus on monuments data comes up too often to not do anything about it. While the international Wiki Loves Monuments team is not directly involved in this space, we are thrilled about this initiative and are following it closely. :) If there is something we can help you with, please ping. We may be able to give a hand.
I understand that this effort is in exploratory stage, and I'm already quite excited about it and questions pop up in my mind: how does the change of incentives (points in this case) will have impact on participation? And, how much can you accelerate the growth of content on the topic of monuments with this approach? Comparing the organic growth of those articles that you don't recommend or include in your content versus those that are in the competition can provide you with valuable insights.
Anyhow, best of luck with it and looking forward to seeing the result of the contest and this effort. :)