In this articleSIRIThomas Fuller | SOPA Images | Lightrocket | Getty ImagesSiriusXM, the audio entertainment company that's long been known as a commercial-free option for in-car radios, is betting on advertising to propel its business.On Tuesday the company launched its first ad-supported subscription plan for car listening called SiriusXM Play. It's a cheaper option than its long-standing offering and will cost less than $7 each month for in-car and streaming. It features a limited set of commercials on a ...