yup, you can just sign up and axe it. and actually i do believe it's 30 bucks, not 10, since you can sign up for up to 3 accounts per person according to their terms and conditions. so you get the 10 bucks when you send cash for the first time, so create 3 accounts, have each send some money to the next one or something, wait about a day, get 30 bucks and close your accounts.
i did this a while back, though i also did the rewards deal that the previous poster mentioned, and racked up another 300 bucks or so in free rewards dollars on my credit card before they called me up and politely asked me to stop haha