My friend's theory on limited Paypal accounts: Paypal moderates an account that is not verified, but has recent payment activity. They wait until the account has a couple hundred dollar balance, then they limit the account, launder the money, and spoof the balance associated with the account. Then they launder your money for 180 days or wait until they receive the proper information in an effort to unlimit your account.
Now, I am not one to believe in conspiracies, but Paypal rarely limits accounts with $30.00 in it.