Complex sentence: Once Shure introduced its own UHF wireless microphone system, which featured wireless versions of several popular Shure microphones, they no longer made capsules available for other manufacturer's systems, which encouraged sales of Shure wireless systems and gained Shure market share in the category.
Split into simpler sentences: Once Shure introduced its own UHF wireless microphone system, which featured wireless versions of several popular Shure microphones, they no longer made capsules available for other manufacturer's systems. This practice encouraged sales of Shure wireless systems and gained Shure market share in the category.