When you land on ymprove.gmx.at, you're greeted with a 404 error — the digital equivalent of a vacant lot. There's no content, no about page, and no record of the site ever having existed in the Wayback Machine. For a subdomain under gmx.at, that's unusual. Most personal blogs or hobby projects at least leave a trace. Here, there's nothing.
So is ymprove.gmx.at a scam? Not necessarily — but it's also not a functioning website. Without any content or contact info, there's no way to verify who runs it or what they intended. The absence of security warnings is reassuring, but a dead link doesn't inspire trust. If you're looking for ymprove.gmx.at reviews, you won't find any — because there's nothing to review.
My advice: treat this like an empty storefront. Don't enter any personal data, don't assume it's safe just because it's not flagged. Wait until the site actually serves a page before considering it legitimate.