from marc's blog:

   * Throughout the eBay board’s process of divesting Skype, I fully disclosed 
   my potential interest and recused myself from all deliberations on the 
   transaction, including all discussions, negotiations, and decisions. I was 
   uninvolved in eBay’s decision to spin off Skype and in eBay’s decision to 
   choose to partner with the Silver Lake syndicate.
   
   * eBay’s retained ownership in the Skype spinoff was 30% vs. Andreessen 
   Horowitz’s approximately 3%. That much larger ownership gave eBay a far 
   bigger role in decision making on Skype after the spinoff than Andreessen 
   Horowitz, as well as a far bigger economic payoff on the sale to Microsoft.
   
   http://blog.pmarca.com/2014/03/03/my-statement-on-ebay-director-role-and-governance/

Ebay retained 30%, so we're really arguing over 70% of the gain that didn't go to ebay. And some of it was always going to go back to the founders because Meg Whitman is a fucking moron -- she not only bought a company without buying the backing tech, but then proceeded to fuck over the founders, screwing them on over $1B, who retained ownership over the backing tech. No cause for bad blood there! Leadership!

Anyway, it does seem a little sketchy, but on the other hand, marc seems to have acted well within established business practices.