Thank you for the comment Joe, it opened the door for me to explain more about the content management capabilities Kitely's technology provides :-)
Kitely's export control system tracks every item sold in Kitely Market both when it is in people's inventories and when it's rezzed inside Kitely. The data our system already collects will enable us (once we implement this planned feature) to not only provide the same type of functionality you mentioned existing inSL but to also enable features that SL doesn't have.
Kitely Market will soon enable merchants to automatically deliver new versions of their items to their customers - optionally replacing old versions of those items in people's inventories so no-copy items can be updated with new versions without giving people additional copies.
Content sold in Kitely Market that is marked no-Export is filtered out from hypergrid access and from OAR exports. Merchants that are willing to sell in closed OpenSim grids can sell no-Export content in Kitely and be assured it will be protected just as well, if not better, than on those other grids.
Allowing export may have a higher risk for illegal copying of that content but, as mentioned previously, it enables getting money from people who wouldn't buy from you otherwise. If you're trying to maximize your profits you want to be selling to anyone willing to give you money. The people who will steal from you can already do so by copybotting your content inSL or getting it (directly or indirectly) from someone else who has.