It's stupid, destructive, and just plain bad business.
So next time you read that WSO ad copy, think about it in this light. If you have a strategy that makes a significant amount of money, you're not going to sell it for $7.95. Even if it's not prone to saturation, it's important to maintain some confidentially in business.
There are some great WSOs. Many involve downloading software, coaching, introductory guides, etc. However, the promise to show you how to make $4,055.11 in two days? That's B.S.
You'd be much better off losing your time and money experimenting yourself, and gaining the first-hand experience.
Yes, I've made some generalizations here, but I hope what I've written is food for thought.