If my piece of content is so unique and valuable around hiking backpack recommendations, that other reputable outdoor websites are willing to link to it and build the page’s authority, then I’d have a very real opportunity to rank high in organic search for these search terms (meaning, my page will come up first when someone searches for hiking backpacks).
There is no money made without a risk taken. Whether it’s starting a business or investing in stocks, every avenue to making money requires some risk. Even selling your old furniture requires you taking the risk that the buyer will show up and will pay you. It is a comparatively small risk when compared to deciding whether to spend millions of dollars on a new product line, but it is still a risk.
If you're unfamiliar with the concept of arbitrage, here's how it works. Wikipedia describes an arbitrage as effectively, "the practice of taking advantage of a price difference between two or more markets: striking a combination of matching deals that capitalize upon the imbalance, the profit being the difference between the market prices." Clothier was able to identify arbitrage opportunities in the grocery industry with precision.