Perhaps you missed the line "My second piece of advice is to only drink juices that you make yourself", which is soon followed by a nice SEO-friendly link on the text "See here for where to buy juicers and Vitamix blenders."?
Why would a juice machine company want people buying juice from shops?
Maybe he missed the part on their website where they said the firm uses 'journalism' to generate publicity for their clients.
I've mentioned on here before but the best book I read in grade school was Vance Packard's The Hidden Persuaders about how PR and advertising people manipulate public opinion. Sorry to say this fifty year old book is out of print, check your library and you won't be sorry.
Why would a juice machine company want people buying juice from shops?