Are you only entitled to these bonuses if you sign-up for a bonus when you open the account?

I haven't worded that very well... What I'm trying to deduce....

If I get home tonight, open a real money account on Stars with no bonus (as there aren't any on at the moment), will I be able to take advantage of future bonus offers?

I am eager to get started- hence I was planning on starting on the nano limits tonight. For the sake of $10 or so, it it really worth me waiting for a few weeks until the bonus offer comes along?

Ian