It's not just money (although it is money) --there's that ego thing going that you often find with retired, out-of-work, untenured or otherwise marginalized "scientists"--
Your #629 - I would expect that. I've never seen it myself, but there are always has-been scientists looking for a comeback. Just look at the asteroid issue. When there seemed to be money to be had every scientist and organization came out of the woodworks. When the money dried up, so did the story.