Can someone explain the Google Map option to me

Hi All.

Can someone explain how the Google Maps Enhancements work.

At the moment my customers have the option to select “Google Maps” when posting an ad.. But if they tick the box they don’t get any extra options to set a map on there page.. But still get charged..

Then I thought .. maybe I don’t have it enabled.. and I was right.. So I enabled it.. But now everyone can use it regardless of paying for it or not.

So what can I do ?

I want the option there for people to use it.. but they have to pay.

So how can i have it enabled and only available to people who select the enhancement ?

thanks.