Thanks for the input.
I guess that makes my plugin in the JetPack category. As the free functionality in my plugin always will be there, and the plugin will be functional. But you can pay to get data into the plugin from a webserivce and then unlock some extra features based on that data.
So as I understand it – that would be okay with wordpress:)
Thanks again for your input, will finish off version 1.0 of my plugin, and get it reviewed – then I hope it will get accepted:)