Carl Icahn, the corporate raider and one of the largest stock holders in eBay, forced the spinoff of PayPal to maximize share holders value. PayPay was/is growing faster than eBay and the stock holders of PayPal will be the benefactors of the split.
Most people do not realized that eBay was only about 1/2 of the transaction of PayPal.
If eBay would give Icahn his head they too would benefit. eBay is its own worst enemy. They think flogging their existing customers, their sellers, for higher fees is the way to grow the company instead of looking for new sources of revenues. When they do seek new sources such as they did with Skype and PayPal, they strangle them instead of letting grow.
PayPal is growing at rate of 19% a year, eBay only 10%. The split allows PayPal to grow with out being hindered by eBay policy.
Icahn is a genius. He is a brutal, insensitive jerk but a flippin' genius. If the government had listened to Icahn, General Motors would not be in depth, it would not be owned by the Chinese, Canadian, and US Governments. He would have saved it as an American Company.