Originally Posted by D'wilius
Aside from that, the general difference between staking and selling action is this:
With staking, you're asking for someone to put up your entire
buyin for the game. So you're playing entirely on their money.
When you sell action, you're only asking someone to put up part
of your buyin. So you might pay half the buyin yourself, and take money from five other people to fund the other half of the buyin.