When you visit a site like puml4cc.stratus-addons.com, the first question is who's behind it. Here, the answer is nobody you can identify. There is no about page, no contact form, no social media links, and the domain has no history in the Wayback Machine. Most legitimate software or add-on providers make it easy to learn who they are. This site doesn't, which is worth noting if you're considering using it. The technical side is fine: HTTPS works, the site is fast, and it hasn't been flagged by security services. But those are table stakes. The missing identity and transparency are the real story. Without knowing who runs the site or how to reach them, there's no way to know what happens to your data or your money. We'd advise waiting until more information appears before doing anything beyond browsing.