Watch out! Many networks take a cut even before it shows up in your analytics now.
I found out from a big wig at a MAJOR network that this is usual practice now. They can put "you receive 70% (or whatever) of the net profits". Problem is, net profits is after they take out money for supposed promotions or to pay their employees (because after all, you are using their network and they need to pay their employees) or whatever. I was confused because I signed with a major network and they said I would get a 90%/10% split which sounded great. So I signed, only to find out that my analytics had A HUGE drop from what I was making from just adsense. I asked the network and they said "oh, thats just what you're making. Look at the analytics. It tells you everything." Then I spoke to my friend who works at another network and he told me what they do... Then I looked at my contract.. Sure enough, it says that the network is allowed to take out money of the gross profits and I get that 90% percentage out of the net profits.
My friend from the other network said some networks take up to 90% out first. The networks sell the ads on vids from $6 (the lowest) to about $12 on average. The big networks split it about 30% to youtube first (50% if their a really small network) so say we took the lowest amount for an ad $6 - 30% for youtube = $4.20 left. I should get 90% right? No, the network then takes out a percentage first then it shows up in my analytics as 70 CENTS.
Then they split that 70 cents 90%/10% with me. That is CRAP!
I went from making about $3.80 cpm to 70 cents cpm (even lower last month) after I signed with Machinima.
I have a pretty big channel too. Gets about 3 million views a month. I am barely making a living anymore and now I'm signed with Machinima for 6 months.
Last month I got over 3 million views and made under $2000.