This may be a silly question to you guys. But I want to know that are the product review sites still in play? I mean, I can create a site which will have reviews of products from CJ or clickbank, in order to earn from their commission.
Why wouldn't they be? You can always build a site for reviewing products. Instead of reviewing random products its better to follow up a specific niche in this case.
Don't only just review products build content in that niche too. Only in that way you can achieve the rust of your customers to buy.