Money helps the ups and downs, differing moods and being a wanderer. I bet the money is more important to some band members than others. And, I am sure the money doesn't hurt when making decisions on their personal future plans.
Since the shows sold out so quickly, they could have charged a bit more. And, by giving fan club members GA tix for under $100, they show a bit of a less greedy side.
Sure, they like the money. But, saying they are doing it solely for money- I don't know. Now, keeping their rock star status and enjoying the lime light- another possible reason to add to the money. Plus, they sure seemed to enjoy themselves in 2014- they like to play great music. Maybe 3 love to play and the other does it for the $ and friends. All I know, I am glad they are touring!