I got the following message on Twitter this morning. Keep in mind, I'm not even the dev; just someone who supports him.
Stay classy, Internet.
I wouldn't pay too much attention to him. Based on some of his other posts, he doesn't seem like a very pleasant individual at all.
When there's a big, flashy "Help vote this game on Steam Greenlight and get a Steam key once it's done" sign on the game description, I'd say Steam keys are a little more than promised. But yeah, these scumbags are really entitled to something they were promised at the moment of purchase.
Total assholes, wouldn't you agree?
Because at the end of the day they are still customers, and the one who broke a promise was the dev. They are only asking for what they were promised.
I don't really think some of the people he was apparently referring to were simply "asking", but yes his choice of words as well as the ease with which it can be taken out of context was stupid.