The advice is to buy descriptive domain names and build a business basing your decision "solely off the domain name" that you're able to find. His About page claims that he himself does this. But does he actually do that?

Of the examples he gave – ComputerCamp.com, ShippingSupply.com, KobeBeef.com, CameraBag.com, Pacifiers.com, ZoysiaGrass.com, SouthernCookbook.com, Ziplines.com, CannedHam.com, SexyBastard.com – every one of them except ShippingSupply is a parked domain, spam site, or fails to resolve. Since the article is from January 2017, it seems like the average price of $5388 that people paid at auction for the 9 unproductive sites has been wasted for the last 3+ years.

As far as I can tell, his business is buying and selling domain names. (ShippingSupply, although it looks real enough, does not belong to the author; he writes "sell shipping supplies [is] exactly what this buyer did".) I can believe that the author has a profitable business doing what he does (buying & selling domains), but the artilce does not convince me that building a business around nice-sounding but arbitary domain names with no expertise in that business is a good idea. It doesn't seem like he's doing that.