Earlier this week, Alibaba.com launched a new business-to-business platform, and now, it looks like eBay and PayPal will get a boost from it, too. It's been decided that AliExpress will offer PayPal as a payment option. This may turn out to be a significant moment for both sides. Alibaba is a successful ecommerce platform based in Asia, with about 47 million registered users, but of course AliExpress is brand new. And PayPal is a big moneymaker for eBay, with roughly 84 million active accounts in existence, but Asia isn't its home market.