Seems that Hut and Cummings have been in a spat the last couple of days.
Earlier this week Cummings tweeted that he'd backed Hut's book and Hut retweeted it. Both the tweet and retweet have since been deleted. At some point a couple of days later, Hut apparently tweeted something Cummings took issue with (whatever it was had been deleted by the time I saw it) and Cummings responded with something along the lines of "That's simply not true, I've always given you honest criticism" or something like that (I didn't archive or cap it because it was 3am and I was tired).
In any case, Cummings tweeted a few things yesterday pointing at what appears to be Hut's thin-skinned reaction to Cummings' criticism of his work, and Hut's subsequent refunding of Cummings' contribution.
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