Airfish in Germany originally developed and marketed them, with great fanfare I might add, which confused people who associated Airfish with importing quality wild fish-- in fact when Airfish initially sold them it was with a sort of apology to the purists in the hobby. If you followed Airfish over time you could clearly see them gradually line breed them to get the pattern they wanted, which started out as the blotchy looking bars Airfish was so proud of and sold at high prices. Since then others have produced similar fish, either on their own, from ones they bought, etc.
Airfish once had a good reputation but a few years ago I started seeing bad reviews. Meanwhile Airfish started posting names of exporters they felt mishandled their fish, customers they claimed didn't pay, etc. Don't know the story behind the scenes, but it got weird. Few years ago they were reportedly up for sale, don't think they're around anymore.
On a trip to Philadelphia a few years ago I stopped at a big lfs and, what do you know, poor quality frontosa with missing and badly broken up bars for sale as... wait for it... "Burundi frontosa" --as though the "Burundi" label explained the weirdness and made them worth more than regular frontosa. If I'd cared to, I could have bought a few of them, bred them, and easily passed the worst of the resulting fish off as panda or black widow fronts. Like them or not, black widow fronts are basically Burundi with blotchy, broken bars, line bred to a certain look with some clever marketing added.