You got it wrong. The ad must be payed for with "hard" money. Hard money is money that has been paid to a candidate and recorded as such. The effect is such that if you don't support a candidate (or the candidate doesn't support your views) you can't place an ad because the ad must be funded by a candidate that has access to "hard" money.
EBUCK
Eg: Any pro-life organization out there can collect $$$ from their membership and buy any number of issue ads to run right through elections supporting their stand. The ad just can't promote (or discourage) voting for a candidate by name.