Complex sentence: Taang! put out 15 releases over five years, and they sold well in US chain stores during a period in which many record labels were closing down due to financial troubles.Taang! was thriving, Taang! was the first label to sign to digital.
Split into simpler sentences: Taang! put out 15 releases over five years, and they sold very well in chain stores around the United States during a period in which many record labels were closing down due to financial troubles. In addition, Taang! was the first label to sign to digital.