It makes perfect sense with the little bit of contextual knowledge that credit card companies sell your purchase data to whoever for whatever reason today, and I'm pretty sure Google uses buys and uses this info.

So - the first sentence refers to the potential program in question i.e. FB doing some kind of financial integration. The second part I think is FB's 'furthermore' in reference to the fact they don't seem to buy data from VISA to integrate into ads. Since the later is a rather common thing, I guess they felt the need to clarify.

It's funny that everyone is up in arms about FB using FB data to make ads ... when VISA, MC and AMEX basically sell all transactional data to pretty much anyone for any purpose. And this has been going on for some time and there doesn't seem to be a big fuss over it.

Personally I think the sale by Visa of all your transactions is a much worse violation of privacy because it's financial info, there's no overt 'opt in' for this, and it's sold and used willy nilly for whatever.

But to your point I don't think that too many people are aware that Visa is selling data so the context required for the later comment may not be obvious.