The financial aspect does indeed seem to be an important factor. For example, most bands play both Rock im Park and Rock am Ring, but it is entirely possible to negotiate playing only one of the festivals.
It's not the case that if one of these festivals fits in well with your schedule, that there is no other option but to play both.
Maiden obviously didn't want that.
It's not the case that if one of these festivals fits in well with your schedule, that there is no other option but to play both.
Maiden obviously didn't want that.