Can I use Draken for commercial purposes?

No.

The payware Draken models for Prepar3D as well as the freeware Draken 4.1 (FSX) and 3.2 (FS9) are only intended for personal use and are only sold to private individuals. If you are a company or any other type of organisation you must purchase a commercial license, regardless of how you intend to use Draken. Commercial licenses are quoted on request.