trace.starbucks.com isn't a business or a storefront. It's a Starbucks-controlled session sign-out gateway, the kind of page you land on after logging out of your Starbucks account. So the question isn't 'is trace.starbucks.com a scam' or 'is trace.starbucks.com fake' — the real question is whether it's the official page for logging out, and the signals say yes.
What matters here is that the page is hosted under a verified Starbucks domain, enforces HTTPS, and includes a valid privacy policy and terms of use referencing Starbucks Corporation. The WHOIS record doesn't reveal a separate owner because the domain belongs to Starbucks itself — which is exactly what you'd see for a legitimate corporate subdomain.
There are minor hiccups: the site lacks a favicon, and the sitemap isn't configured correctly. But for a single-purpose logout page, those aren't red flags. If you're on this URL after clicking a Starbucks logout link, you're where you're supposed to be. Treat it as you would any Starbucks property — trustworthy for its limited purpose.