One address handles corrections, data questions and advertising: hello@rustservernow.net.
Email: hello@rustservernow.net
A server looks wrong: Most values come from what the server publishes itself: name, description, tags, wipe schedule and header image. Update them there and the site follows within five minutes. If a wipe is missing or a value stays wrong, send the server's address as ip:port and the figure you expected.
Advertising: Check the advertising page for what is on offer, then email with your plan.
Using the data: The numbers are free to use in a project. Ask first, and we can point you at a cleaner route than scraping pages.