Nice find! Yep I read about fermentation as well. I'm neither a huge fan of sweet or vinegary hot sauces so I usually find Sriracha or Mexican hot sauces (eg. El Yucateco) as my go to's.
El Yucateco kutbil-ik xxx hot sauce is my number one. it's so damn hot, and the flavor is unmatched. the black special reserve one is next level too. at this point my cellular makeup is roughly 20% habanero because of them.