I don't know revenue/profit (I think they're listed, so you can check them online). Sales on this day last year was something like 5.2bn RMB from memory? Again, not sure about commissions either - I've only ever bought stuff from the site.
Again, AFAIK everything goes through ZhiFuBao. It's an escrow service in fact, so the buyer must confirm receipt of the item before any money goes to the seller. There's no COD, and that's part of the success (people in China are very worried about scams and had zero faith in online shopping before Taobao setup their system). You can pay using most mainstream credit cards/banks in China, although I think things like AMEX or mastercard aren't supported.
Again, AFAIK everything goes through ZhiFuBao. It's an escrow service in fact, so the buyer must confirm receipt of the item before any money goes to the seller. There's no COD, and that's part of the success (people in China are very worried about scams and had zero faith in online shopping before Taobao setup their system). You can pay using most mainstream credit cards/banks in China, although I think things like AMEX or mastercard aren't supported.