so in theory, someone could download the source, rebuild, and redistribute a release which would then bypass the Open Source Maintenance Fee, wont it?
But it can still work. in a company, as an employee, you can say a tool needs to be paid and get your company to pay even if there are binaries available elsewhere.
I work for a company that sells open source extensions. It would be pretty trivial and legal to remove the license checks, but companies just pay.