They are in the middle of a big move to a new hosting service. They also have a new web developer. You don’t add a stock ticker to your main page and add Cloudflare protection to pull the sites down for no reason days later.
GrandexFinance is not suspended by Natro. It is a generic splash page. The “contact your service provider” link goes to GrandexFinance.com. If it was a Natro account issue, all Natro sites would have the same page that links to Natro account services. These sites were taken down voluntarily for a good reason.
There are ways to take a peek at what is going on for those with knowledge of online / web based architectures and the associated systems that make it all work. It’s not worth explaining here.