The reason why I mentioned AdSense is because YouTube automatically takes 40% revenue. Which is understandable. Their site, their money. If you are partnered with a network, that does not go away. YouTube will take their share then the network will take a share. That is why I said it is best to go with no networks. However, once you become "important enough", you might gain just the same amount of money as with AdSense, except getting paid through PayPal. Networks have the possibility of placing certain advertisements on your videos at which payout slightly more than YouTube automatic ads. However, they particularly don't do this for small channels. Another thing networks do is they "can" help you with copyright issues. Although, not all will if they have the ability, and not all have the ability either. Some may also be able to supply you with copyright free music/sound effects. So, basically, become important first, then Networks will be beneficial.