Check out this ALC sign up bonus they have been advertising on Yahoo. For new players if you put in $2 and buy a 6/49 ticket online ALC will credit you $10 in your account.
That amounts to a 500% deposit bonus on the $2. It's actually a bit better than that because as I show in the post below the $2 ticket has around 68 cents of equity.
The $10 bonus is unrestricted clear money in your account and you don't have to put it in play. You can withdraw it direct as straight cash.