His business was selling generic "herbal remedies" IIRC. Which is bad/predatory IMO. And going further to meta-hustle that this is salutary enough to recommend to others without any seeming compunction is meta-bad.
(I know it's bad posting something this dismissive in deeply nested comments, but I believe it is relevant information to the discussion which hasn't been mentioned elsewhere. I tried elaborating but the elaborated versions of this comment were more cynical/uncharitable, not less, so I'm keeping it short instead).