Yes.  It could be - but I'm not sure how likely - that this is a simple Ashley Madison extortion for btc. It would be genius if the hackers found Satoshi in the trove of data.  I believe there are some old posts of satoshi's talking about using BTC for porn, so Ash Madison might be right there in the scope of his interests.  In a way, I think this is the simplest explanation for what is going on - its just too convenient and stupid (risky behavior) at the moment (I mean, csw seems to have been gone from his house in Au for a while - I sorta think he knew the law was coming and he made a getaway plan that put focus on the other side of the world).