This would be nice to have. My free subscription runs out in a week and I'm definitely not paying money for that, but would also like to not have a useless button.
Evil Minion: Down here in the very deep south, we have TMC - don't you have this ?
TMC is an "add-on" to the native SATNAV system- it automatically updates the screen showing trafficv problem. I also get a list of traffic updates when I press the TRAFFIC button. No money is paid by the driver. TMC happens over the commercial FM radio band here - it uses a sub-harmonic frequency of the stereo signal and data is transmitted using RDS.
TMC is turned off by VW Australia, but it's easy to turn-on (see below), but it needs an activation code. Here, the code is 1024 (our TMC is provided by SUNA)
here are the other codes for TMC that I know:
65535 - TMC OFF
1024 - SUNA Traffic (Intelematics)
0 - dev options
32771 online traffic + VW TMCPro
Don