(Business 2.0) – When Viacom spins off its 82 percent stake in the Blockbuster video rental chain in early October, the media giant will shed a noncore business that's in the midst of upheaval. With Netflix in the crosshairs, Blockbuster is looking to raise cash to expand its online DVD rental service and in-store videogame boutiques. Blockbuster Online will offer an all-you-can-eat subscription rental plan at a price that undercuts Netflix by $2 per month. As competition heats up, the DVD rental marketplace is expected to grow from $289 million in 2003 to $605 million this year.