A company's web site is a reflection of their brand (start up or not). This is a poor reflection. Being a food product / brick and mortar entity does not get you off the hook.
From a philosophical perspective this is true, but even if this website is a poor reflection on Tazo, this has a minimal impact on Tazo's revenues and profits.
Tazo isn't an island unto itself. Major brand websites affect the style of the entire internet (see Google and Twitter for two recent examples) and so it's right to say this is an example of a crappy 1998 "landing page."
I suspect the change would bring in enough profit over the course of a year to justify the 10 minutes it would take a bad web developer to put in a redirect from the landing page to the main site.