AirNav Systems is offering their FS Live Traffic as a subscription now. To get the entire world it will set you back some 90 Euros for 6 months. If you don’t want or need all that traffic then you can get the US or Europe separately.
Oh, what it does? “….. No longer your traffic will follow the published schedules of airlines, as first generation AI traffic products did, or optimized schedules for the Microsoft Flight Simulator world – now you will jump into the traffic as it is in real world – your simulation will initiate one minute before you fire up Microsoft Flight Simulator….”.
Get it here at simMarket.