Usually this is less being outright deceptive (saying you're up when you know you're down), and more wrapping the definition of "down" in legalese so that nothi

Usually this is less being outright deceptive (saying you're up when you know you're down), and more wrapping the definition of "down" in legalese so that nothing short of a complete system outage of every aspect of your service for 100% of users counts as "down". In those cases status pages are more likely to have a lovely spectrum of yellows and oranges to choose from, but a distinct absence of red, but very few companies will say that they're fully green when they know there's issues. Green when you're down is usually more of a symptom of process problems in how outages get reported or resolved (no documentation, manual processes for updating, long communication chains from support teams to engineers).