XM subscription started by itself...not sure how or why...

I'm not complaining, but wondering how and why? Is this a promo currently going on or something? I've had it for the last 3 days.
Any ideas?
Later versions of the MB sirius receiver are able to recieve the "Best of XM Channel"... 1 channel with a smattering of shows from different XM channels.
Later versions of the MB sirius receiver are able to recieve the "Best of XM Channel"... 1 channel with a smattering of shows from different XM channels.
It seems that I have all the channels, not just one.
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The snail mail letters keep coming though and emails too. Unable to stop them.



