The market subscription data is in all likelihood just to get live pricing data from the JSE. You can still transact on the JSE, but you will not know at what prices you are buying or selling (cause your JSE data will be delayed by 15 mins) until the trade has been done. That $10 is what the JSE charges, not IB, similar to the R95 a month they charge locally for live data. Bloody con if you ask me and I personally can't wait for A2X to get more listings. It will make that live data fee obsolete.