Envato’s web template marketplace ThemeForest is changing its WordPress theme licenses. As of August 4th, all WordPress themes will be sold in two licenses: GPL and Standard License. The latter only applies to CSS, JavaScripts and images, not the actual WordPress themes files. Anyone not OK with this should remove their items prior to August 4th.
Why do they do this? In their own words:
1: Technically, we have to. :)
2: It’s important to respect the spirit of WordPress. This is the way it was intended.
Most resellers of premium (commercial) WordPress themes have gone this route, if nothing else but to be included on the wordpress.org featured page is my guess. You might want to refer to our guide to the GPL license for more. You can purchase ThemeForest themes here.