What I am asking is:

If I change the license of my 3rd party component from commercial to GPL, will I get the following support from the externsions.joomla.org:

If noone come up with REAL improvements of my component, will clones of my component be excluded from the extensions.joomla.org ?

I mean, I will live with all the rest of the risks (someone selling it etc), but will extensions.joomla.org will be pointing ONLY to my website for distribution (except if someone can prove that they have really added functionality, not just twicks).

And will this assurance come in some kind of writting, in a binding way (so that it will not be removed in 2 years like the rider).

Is this a lot to ask as reassurances?

It's a good point, one we also discussed with the JED team. The decision has been made to sort of the following.

* No extensions on JED which only rebrand/slightly modify an existing extension (commercial or not).
* An exception to this is if an extension is not supported any more by developers.
* A second exception would be a proper fork (rename, different versioning system, added new features, moved away from original code base).

The wording will be different. It will be added to the list of guidelines/rules of JED. You have to give credit where credit is due. This rule would have been added to JED anyway, GPL discussion or not. The GPL discussion is a licensing issue, rules/guidelinesfor our own sites are different. They are only tweaked/added to when necessary, this is one of them.