Please elaborate. I'm not sure what you mean by this, and there may be (are!) differences between how paypal operates in the .us versus the .eu.
Were you not allowed to _send_ money with only your credit card on the paypal account?
Or were you not allowed to _receive_ money with only a credit card on the paypal account?
Sorry. It's late here, I'm tired, and I'm not reading your words as clearly as I should. Though I haven't done much in recent weeks, I do volunteer work for a non-profit organization here in the US that specializes in helping victims of online fraud. Sadly, the "paypal drained my bank account" story is repeated regularly.