Postulate that I have a GPL compliant plugin that wraps around a service that you must pay for to use.
Would such a plugin have any problems getting into the directory?
Think Akismet but without the free access.
How a about themes that work the same way?
Can also add. What about a fully GPL compliant plugin but which comes with 30 day trial key or something for the service?
Again what about same thing but with themes?
Where do WordPress.org team draw the line?