We recommend linking 3-5 Ad Networks. But It depends on your traffic uniqueness. The less it is, the more Ad Networks you need.
Our system will find the best Ad Network for each visitor and it needs more options for better results.
And you should definitely enable Ad Networks from our SSP Marketplace including our Direct Advertisers. Just turn it on at SSP MArketplace:
Feel free to get in touch with our Support Team to check for the details via Live Chat or at firstname.lastname@example.org.