Maybe it has somthing to do with the life of the satellites, I played siri back when it was CD Radio and XM before the satellites where in the air, and if I remember, one satellite had something wrong with it and was going to have a short life.
It's been soooo long ago,back when I thought $50.00 a share was a great buy. LOL
Have'nt followed it untill about the first of this year.