eBay couldn’t force its Australian sellers to use its wholly-owned PayPal payment service, but that’s not stopping them from trying the same trick in the US.
I wrote about this previously, though I didn’t mention that eBay gave up in face of such clear opposition — the 700+ submitters and the ACCC, that is, not me! However Lauren Weinstein writes that in the US eBay has announced that PayPal (or credit cards) are to be the required mechanism for all transactions.