As a title. I need to buy ads in gaming (computer gamers - but not gambling) niche. I want to have ad on one or multiple website/s or forums. The vision is to have advertising on the top or side of the page. What I don't know: where to buy or see offers with ads. I want to buy it directly from website owner or admin. So I don't want to buy it from Google, Fb, etc... Cheers!