Can I pay Ads with OGV virtual currency?

Yes, you can use your OGVs to pay for your ads.

On my account page, under OGV tab, you can see how much OGV you have left from your previous ads. If your ad runs out of time but your target hasn't been reached, the remaining clicks/impressions will be converted to OGV.

You can request this amount to Owner Group by clicking on add request button. Status of your request and response from Owner Group team will be shown in this page as well.