Complex sentence: Originally started in the 1990s, it suffered a period of dormancy during the millennial change and has then seen a resurgence, with new products released during 2004 and 2005, and has been constantly growing ever since, despite the financial crisis at the end of 2008.
Split into simpler sentences: Originally started in the 1990s, it suffered a period of dormancy during the millennial change. It has then seen a resurgence with new products released during 2004 and 2005 and has been constantly growing ever since despite the financial crisis at the end of 2008.