I perma-deleted my Facebook account last week.
Whatever the motivation of this acquisition, Facebook simply doesn't appear to do enough to look after my privacy, especially given the personal and sometimes sensitive nature of the data they are handling.
The notion that they want to expand into online payments and banking is laughable without a dramatic rethink of their approach to data.
For a company which built their reputation on protecting their users' privacy to follow the path it has is tantamount to business suicide.