Complex sentence: A petition set up by loyal fans was signed by over 500 fans, listeners, KOL Staff, and celebrities, however on 13 February 2008, AOL discontinued all of its live video streams.
Split into simpler sentences: A petition set up by loyal fans has been signed by over 500 fans, listeners, KOL Staff, and celebrities. On 13 February 2008, AOL discontinued all of its live video streams.