Lost Spoilers: Why Miles Blackmailed Ben

Do you remember when Miles blackmailed, - err, tried to extort - Ben for $3.2 million dollars during Lost's fourth season? 

Okay, we know it was awhile ago, but Miles offered to pretend like Ben was dead in exchange for a cool $3.2 million.

Why the arbitrary amount And why would the blackmail at all? 

According to TV Guide, we're gonna find out why, as a dollar amount other than the $3.2 million is brought up in tonight's Miles-centric episode, "Some Like it Hoth."

Got any guesses before the hour airs, readers?