Only one link per account - but you can have lots of accounts.

If I click the bitstars link in your sig, what percentage of my losses will you pay me?

Edit: I checked out their "100% first deposit bonus": they'll double your first deposit up to 0.3 BTC but you have to play it through 35 times, and wagers only count 5% of their value unless you play slots, so that's 700 times, and the max bet is 0.1 BTC, so I'll have to make at least 2100 bets to claim my "free" 0.3 BTC - and I only have 30 days to do it, or they'll subtract the bonus amount from my account, and any losses I made so far come out of my initial deposit...

What a warm welcome!

So how's their affiliate scheme? If I make a single large bet on blackjack and lose, how much will you give me back?

Edit: "We know a good rate of commission is important. That's why we offer you the chance to earn up to 40% each month whether you are promoting Euro or Bitcoin gaming."

40% of what, exactly? What does "Net Gaming Revenue" mean?