So I've been flying using the standalone AI traffic injector called Enhanced Live Traffic from Mr Propper (flightsim.to) and I'm very happy to realize that Pf3 fully interacts with these FlightRadar24 live traffic injects... Using the right callsigns or tail numbers as appropriate. Obviously it uses the interaction parameters you set in Pf3... But I've never heard Pf3 ATC talking so much while enroute.
Cool!
BTW... If you do use that tool there is some model matching tweaking that is required to getting it matching well... But when it does your FS world comes alive with live traffic... Ifr and VFR!