PayCeleb] is a platform to buy niche traffic. Publisher can submit their website, apps to sell banner spot, text ads, menu item as ads. Advertisers can book a spot for 30 days. PayCeleb has affiliate system which ensures 5% on publisher refer lifetime, 10% on advertiser refer for lifetime. If you need grey and sensitive traffic you can buy from fixed pie. Also if your website has grey contents try fixed pie they allow all type of sites.