I'm not as familiar with Behringer, but Gates' success was primarily due to the first two methods of operation. He benefitted hugely from the government enforcing copyright monopolies on software as well as patent monopolies on file format standards. Most people aren't aware of this but every time you buy a USB key or any other flash storage device you're paying a tax to microsoft.

He also benefitted to family connections to the finance world which is very much a state cartel rather than a market economy.