I guess it is horses for courses, right?
I mean, I don't charge for "extras", I don't even have a concept of it. I have a list of things I will do and a couple of things that I absolutely will not (like bareback) and no amount of money will tempt me to do those things.
What I offer is a true GFE, so everything I will do is included.
But I can see the point that not everyone wants everything... so to have a menu to pick and choose Reviewom is not a bad idea if that is what the mp.net wants, otherwise he is effectively paying for a service he isn't using, right?
So "extras" should really be seen in that light... it's like saying "Well, I don't want all those things, I only want this, this and this" and paying accordingly.