Just create an ppc account with yahoo with VCC and deposit $200.
Setup a Campaign but no impressions and clicks in 3 hrs.
What's wrong?

Hmm, looks like they may have placed your account offline. New accounts that go active should start showing impressions (granted you bid high enough on your keywords) within 30 mins at the most. I recently opened up an account with a VCC an never got impressions either... I called yahoo and I was told that my account is offline because I used a credit coupon....and apparently they saw that my accounts were all opened by the same person. I didnt clear my cookies and flash cookies :-(