RA claims to have adopted this "arm's length" approach, releasing their direct extensions to the community. They ask me for identifying information to let me download the software; don't know if that's against the rules. Critically, their enterprise product is pitched as a collection of separate tools: IDE, debugger, analysis tool, etc.
There are a few other ways that people have made GPL'd code proprietary: (1) providing a hosted service instead of distributing software, or (2) distributing only a hardware appliance that contains inextricable software. The latter is controversial with respect to GPL2; GPL3 more clearly prohibits it.
RA claims to have adopted this "arm's length" approach, releasing their direct extensions to the community. They ask me for identifying information to let me download the software; don't know if that's against the rules. Critically, their enterprise product is pitched as a collection of separate tools: IDE, debugger, analysis tool, etc.
There are a few other ways that people have made GPL'd code proprietary: (1) providing a hosted service instead of distributing software, or (2) distributing only a hardware appliance that contains inextricable software. The latter is controversial with respect to GPL2; GPL3 more clearly prohibits it.