Look at the sub, not the posts. r/ReviewJunkies was created Aug 25 and gets 14 weekly contributions, so it's one person's blog hosted on Reddit. The account is 2 years old with 3.2k karma and a health-nut persona, which is what slips past the filter that eats new accounts posting links.
The money isn't Reddit traffic. Zero upvotes and zero comments don't matter. Google indexes Reddit for low-competition "product + review" searches, and every link out carries an affiliate tag. Easy tell on any sub like this one: the only moderator is the person posting. The same account tried r/BritInfo and got removed by a mod, so it only works in a sub you own.