Do you listen to streaming music? If you want to keep listening, join Save Net Radio, or else on July 15th, most all the streaming music sources will be bankrupted.
Do you like small bands, local bands, indie bands? If you want them to keep getting their own royalty money, join Save Net Radio. Otherwise, the new rules require that all streaming royalty money be collected by the labels instead of the bands, and the band will be required to join, in order to be paid their own money! (Minus a significant "handling fee", of course.)