One address for everything: hello@rustcharts.space. Write to it about the site, a server, the data or ads.
Email: hello@rustcharts.space
A server looks wrong: Most of what you see comes from what the server itself publishes: name, description, tags, wipe schedule and header image. Change it there and the site follows within five minutes. If a wipe was missed, or a value stays wrong after that, send the server's address as ip:port and what you expected to see.
The charts: Player counts, population history and ranks come from live queries and refresh every five minutes. If a line looks off on a server page, send the address and what you saw.
Advertising: The advertising page covers what is available. Email with what you have in mind.
Using the data: The numbers are free to use for a project. Ask first, and we can point you at something better than scraping pages.