Well, they could have still played the games with nobody in the stands. It would have looked like a normal Raiders home game then :)
Raiders still sell out, would have looked like a Jags game.
Now, that's a cruel thing to say. (Accurate, but cruel nonetheless.)
I used to work with a die-hard Raiders fan. He'd cringe whenever I'd walk by his cube and casually ask if the Raiders were going to be on TV that weekend or if they were playing at home.