Before we all get swooned by the effectiveness of his business model - most people probably bought this as a gag gift rather than because they believed in its medicinal properties. Because if they didn't, these sales would qualify as a scam.
Aethaer seem to have grown since their little bit of viral fame a few years ago.
Pepsi (Aquafina) and Coca Cola (Dasani) have an... "amazingly loyal" group of customers. They're buying soda, with everything that makes it soda removed, and paying the same price as if they bought actual soda.
Everything that makes soda soda is bad for me. I could buy soda and remove that stuff myself, which is a fair bit of work. Or I could pay someone to do it for me. The fact that Pepsi does this at no additional premium over the soda is something I appreciate.
So for most people with safe municipal supply it's a complete waste of money no matter what Coke's marketing might try to imply.