I was just on TechCrunch's website. When you scroll to the bottom of the page, there's a Mastodon account icon.
See screenshot.
I clicked the link, and it took me to @TechCrunch. Which means that's their official account (even if it doesn't have a green check yet)
Perhaps @TechCrunch should set up their own instance. It would give their Mastodon presence more authority.