This is not live chat - and each time you send a new message, it actually delays our response since we work chronologically from longest waiting messages. Please consider this guide: https://community.ezoic.com/d/5838-how-to-use-the-community-forum
We'd advise against setting up a subdomain that's not related to the original niche of the site generally, especially because of how AdManager MCM approval works to make sure content adheres to a niche / topic. We'd also need to review the subdomain before any ads could show, and if the content is seemingly not within the niche, there's a chance it's not approved to show ads by our platform quality team.
If you're looking to write on a whole separate topic, our best advice is usually to create a new domain altogether. It would make future troubleshooting easier when it comes to ePMV fluctuations as well.