Every contract SHOULD state a Minimum, I'm with Creator X/Fullscreen which this is the verbage:
"A good faith attempt to upload 2 or more videos per month."
Which, if you didn't meet the requirement, then they can potentially fine you, kick you out of there network, etc.
People always expect them to pay on time but think that the network shouldn't expect anything from the Creator as in
"They should pay me, but I don't want to upload regularly, and if they are late on the payment then I am gonna go on a crazed streak of bad mouthing the network."
I always see things like that posted in numerous places on the internet...
People need to understand what having a CONTRACT means.