The answer is "Yes they will keep taking money from your account"!
Don't give them your account details or you will regret it.
It is unlikely that you will ever get paid work from them anyway.

Hi Michelle,

Thanks for your interest in StarNow!

The cost will depend on which membership plan you choose. Information about our recurring payment system is displayed at the bottom of the page where you enter your credit card details. It reads: "Your StarNow membership will renew automatically every -- months. You can cancel at any time."

To learn more about recurring payments, please read our terms and conditions: http://www.starnow.com/help/terms.aspx

If you have any more questions, please feel free to email contact@starnow.com and we'll be happy to help:)

Cheers, Kalista