This is the key, from the authors I've talked with. As everyone has said, it's a monstrous amount of work for a nominal amount of money. An abstract "feather i

This is the key, from the authors I've talked with. As everyone has said, it's a monstrous amount of work for a nominal amount of money. An abstract "feather in my cap" isn't enough to make it worthwhile. Don't do it unless you have a specific, credible plan to make it worthwhile by providing consulting, training, speaking at conferences and the like.