Den, thank you for passing on the report about that plugin and also for the information on how to report developers who are not providing support. Perhaps this info can be clearly pinned in store itself so people know to do that instead of giving up after posting for help in the forums?
With a more obvious or clearly marked and easily accessible reporting system/link in place, perhaps store moderators would get more meaningful reports as well, which might make it easier on them to maintain the integrity of the store.
Since my previous post was not clear enough, let me try again.
I think it is quite clear that Webmaster Mouladi is not asking for every developer to create free plugins, which is how you appeared to interpret his post. The way I interpret it, he is merely asking that plugins which were at one time free should not be changed to paid and thus requiring people to pay after the fact with license checks now being triggered. If n fact this is ocurring (and it seems Tammy has listed one possible plugin), asking that the premium (paid) plugin with more features be separate makes sense to me. Browse any app store on your mobile and you can see many apps are done that way, with a full featured paid version and a free version.
But let's not get hung up on that because I don't think it is a very common issue in the oxwall store.
I think the far bigger issue is broken, non-updated, and unsupported plugins. Such plugins should not remain in the store (unless demoted to free with a warning label on them for people to use at their own risk due to known problems and lack of support or update). Let's call this "pulling the plugin" for the purposes of this post.
Perhaps after each update to the core, the oxwall store moderators go through and look to see each plugin has been updated to support the latest version. It would be a matter of scrolling down the list and seeing which don't say the latest version number. Those that have not are contacted and get X amount of time to do so. If they still do not, their plugin gets pulled, like I suggested above.
Developers that fail to provide support in terms of fixing reported issues should just get their plugins pulled, like I suggested above.
Hopefully I make more sense now. Any other questions, Den? Anything else you found unclear in my previous post that I can clarify for you?