You will get $25 for opening the account. The part about opening it with $250 I am not sure about because I got the $25 bonus and I opened my account with only $5 dollars, so I am assuming to works either way.
If your friend opens an account with at least $250, we will deposit a $25 bonus in their new account and a $10 thank you bonus in your ING DIRECT Account. If 25 of your friends or family each open a new account with at least a $250 initial deposit, you will earn $10 each up to $250.