Complex sentence: IPL is as well known for its commercial success as for the quality of Twenty20 cricket played--during the sixth IPL season (2013) its brand value was estimated to be around US $3.03 billion.
Split into simpler sentences: IPL is as well known for its commercial success and for the quality of Twenty20 cricket played. During the sixth IPL season (2013) its brand value was estimated to be around US $3.03 billion.