PLR Arbitrage

The general assumption out there is that PLR (Private Label Rights) and PLR products are useless. Nothing can be farther from the truth. Contrary to the popular opinion that PLR products are over-sold and utterly useless, the statistics still shows that these products sell and every single day more and more of them are created. The simple fact that you have tons of PLR products cluttering your hard-drive and the simple fact that you will purchase more PLR products before month end is a strong indication that PLR products sell. So, where did the notion that PLR products are useless come from? Is someone deliberately trying to place a "PLR money screen" on the face of the rest of the Internet population just to deliberately shield the rest of us away from using PLR profitably or what?