I can look at the code. Seems open enough to me [ducks from tomatoes].
People play the semantics game on this a lot but the source is viewable/available/stealable by anyone who wants it. Hackers can find bugs to either exploit or notify the maintainers of and people can modify it to better suit their needs. Legitimate businesses will buy a license if it is of worth to them, I doubt you'll find many that are overpriced for their value.
The fervent animosity towards dual free non-commercial/paid commercial licenses in the foss world has always puzzled me. In the end it is source code readable by anyone yeah? What would you actually prefer, it stays locked up forever?