Have been really thinking about how Nairaland ads work lately just like Facebook and Instagram. When I visit Nairaland estimated ads rate I see various ads rate for different sections but then I also see something like ad credit is it that if I pay for the estimated ads like for a months in a programming section my ads will still be displayed, but what I want to know is that will I still be charged for ads click or it is still my initial monthly estimated ads rate that is still functioning ?