The highest entertainment value seem to be between delta and alpha switch. From where ILE take over it decreases, alpha pretty much capitalize on it til its almost gone and beta grind it to dust. Then there is a point again between beta and gamma when entertainment value is valued again and they build it up and delta perfect it.
Im not sure why or how these ideas came to be but it seem to me that merry use up it and serious build it up. Disney is totally delta.