You shouldn't go anywhere for less than 80/20 (cough, Freedom, cough). 90/10 is preferable, which is offered by Creative Nation and Curse. 80/20 is respectable though, so if you feel good about signing with BBTV go for it.
As far as negotiating goes, unless you're a relatively big channel or bringing in a lot of views you won't have a ton of leverage when trying to negotiate with the bigger networks.
I haven't noticed a significant difference in the CPM between any network I've ever been a partner of. With that being said I have heard of people having drastically different CPM numbers from network to network. The list of networks I have been with includes Zoomin.TV, CN, Freedom, TGN, and Machinima. The biggest difference between them all has been the percentage split.What is the CPM you are getting with CN, Freedom, BBTV?
What is the CPM you are getting with CN, Freedom, BBTV?
With that being said I have heard of people having drastically different CPM numbers from network to network.
A good rate is 100% (adsense)