Once upon a time ...
... I worked in speech recognition. And I seem to recollect working with open source data, too.
OK, noone called it open source. The term had yet to be coined: we had Free Software (and the GNU brand was familiar among Beards), but the term Open Source was still some way off.
The article seems light on detail of what Moz has actually announced, and how it differs from what's been around for a very long time. Guess I'll just have to look at Moz itself to see what's new.