That happens because cable tv cartoons have two functions, selling cheaply made toys and showing ads in the breaks, adults are generally not buying this type of toys and with your show is not being seen by 5 to 10 years old the company advertising toys bitch about it, you could find companies who want to advertise in the 12 up demographics, but ads are sold in at least one hour blocks, so unless you have a lot of this type of cartoon to show you're not gonna want them in you network, that's why CN has a dedicated block for this type of content, if you add it whith the fact that you're not gonna use the most valuable timeslots for this and this type of show not gonna sell cheap toys, plus the fact thet producers are allergic to risk and we have adults cartoons being cheap copies of each other.