At this point I’ve read and seen enough about the Winklevii to last me a few lifetimes, but this article in Vanity Fair was (another) interesting look into their minds.
Like why they won’t let up:
In my opinion, it’s all about how much pain you can make the other guy feel,” said Dan Walsh, another Olympic rower, when asked to explain the lure of a sport that offers neither fame nor fortune, and why two highly advantaged individuals would spend their 20s pursuing it–the Winklevosses were then weeks away from their 30th birthday. “It’s about trying to break him.”
And the power of this new strategy is that it requires only modest success to get the Winklevosses what they want, which is not control of Facebook, but rather to cause Mark Zuckerberg pain measurable in pride and money, and through this pain to avenge their own ideal selves by asserting their will over his.