There's a few $10 free on the prima network, and you also get a few freebies if you've left an account dormant for a while.
There's no point trying to play raked hands with your $10 initial - you need to bump it up to $40 at least. What I tend to do is play micro limits until i get $11, then just play a $10 H2H then a $20 one - often you'll lose it all, but it's not real money
anyway. When you've got enough you can start at the 1/2 tables (10 handed), but there's no point fannyarsing around at the low levels trying to nurse $10 up to $20. I've run a $10 CDpoker bonus up to $120 this week (fully cleared), but more often than not I blow the bonus within an hour.