I care about status pages, because when something breaks upstream I need to know whether it's an issue I need to report, and if there's additional problems related to the outage I need to look out for, or workarounds I can deploy. If I find out anything that might help me narrow down the ETA for a fix, that's bonus fries.

I don't gripe about it on HN, but it is generally a disappointment to me when I stumble upon something that looks like a significant outage but a company is making no indication that they've seen it and are working on it (or waiting for something upstream of them, as sometimes happens).