Dealing with Sirus/XM with changing radios

We were considering getting a 2nd Prius, but ended up with a Camry XLE 4cyl with all the bells and whistles. The gas mileage hit for the type of driving we do comes out pretty minimal with ,by my calculations, considering the difference in price between the Camry and a Prius IV (yes, the Prius is 3 to 4K more expensive) to give a 4 year payout window for the Camry to start to cost more than the Prius.

Anyhow, I digress.:focus: The question is Has anybody gotten any favorable treatment from Sirius/XM regarding having a Sirius unit in one car (2006 Prius) and a Sirius/XM unit in another car (2012 Camry). They still don't seem to have gotten their act together in merging the accounting functions, thereby requiring separate billing accounts.