ws.premom.com currently shows nothing but a 404 error. When a website offers no content, no contact information, and no way to verify who owns it, there is simply nothing to trust. Most legitimate sites — whether a business, blog, or hobby project — have some kind of public record: a domain registration you can look up, a social media account, or at least a working page. This one has none of that.
If you're wondering 'is ws.premom.com a scam?', the honest answer is that we can't tell, because the site doesn't exist in any meaningful form. Scams often use new or parked domains to avoid scrutiny, but benign sites sometimes do the same. Without evidence to prove either, the safe bet is to avoid it.
For now, treat ws.premom.com as not worth your time. If it ever comes back online with actual content and transparency, a re-evaluation might be warranted. Until then, the lack of any identity or functionality makes it impossible to recommend.