6. No Discrimination Against Fields of Endeavor
The license must not restrict anyone from making use of the program in a specific field of endeavor. For example, it may not restrict the program from being used in a business, or from being used for genetic research.
If I author an open-source app and sell it to customers, would point 6 from the Open Source Definition allow other businesses to do the same?
Point 6 is pretty much irrelevant, because Point 1 already allows anyone to sell or give away a copy of your app:
1. Free Redistribution
The license shall not restrict any party from selling or giving away the software as a component of an aggregate software distribution containing programs from several different sources. The license shall not require a royalty or other fee for such sale.
Point 6 deals more with not allowing restrictions forbidding use of the app in warfare, commercial products, harming animals, immoral purposes, etc.
