The question is how you want to make money?

Through consultancy or by selling software?

If you sell software, GPL in a dual license setup seems to be a succesfull combination. The GPL helps in keeping the usage of code transparant.

If you do it through consultancy (implement something for a specific customer) I would pick Apache. It provides the company you worked for security that the specific stuff is theirs without any strings, yet you can create a nice community around it.