The keyword Garcinia Cambogia gets 1.2 million searches per month so the press release ranking at #1 will most likely get half of that traffic, so 600,000 visitors a month. The owner is linking to his website within the press release above the fold so will be getting a considerable amount of traffic.
There is no chance of the page being de-indexed or getting a penalty as he is piggybacking off a major news website.
I promote this product and I know the conversion rate of the product he recommends. Even at 0.5% conversion rate he is making somewhere around 3,000 sales a month and at around $43 commission, well you do the maths.
Then there's the money he is making from a press release in another position on the first page of Google for this product name.
I know from experience that press releases convert well as they as seen as an authority article and are trusted so that figure may actually be on the low side.