Affiliate networks usually payout on net-30 max, or net-7 minimum. Google and other ad networks take payments on net-3 or less. So you have to float money for ads while you wait to get paid.
Yeah it's all about managing cashflow. That's how the entire thing works. Affiliates float money hoping the network pays. The network floats money hoping the advertiser pays. When the advertiser can't pay a lot of people disappear.
