I was one of the backers of Haunts at the $5 tier and didn't ask for a refund. I've backed a lot of Kickstarter campaigns aware that this kind of outcome was eventually expected to happen for a percentage of them. I am also currently studying project management in college where a whole part of the curriculum is explaining how software projects fail.
There is still some hope that this game could be saved and I am watching this story unfold carefully. It is the first real case of a funded project from the Video Games category that has admitted things have gone disasterously wrong. How the project creators react to this situation, like how they offered refunds, will provide a precedent for the next imploded project to look to for guidance.
An odd design decision was that Haunts was being coded with the relatively young Go programming language, which is making it more difficult to find a replacement programmer or outsource. Poking around what files the developer made public on github, it looks like the artificial intelligence was scripted in Lua and (As a fan of Lua) that makes me wonder why they didn't just make more of the game with Lua rather than Go.
Here are two thing that I have recently developed some concerns about for the backers community on Kickstarter.
First, I have seen posts about people that aren't in good financial situations that are still scraping together hundred dollar pledges for multiple campaigns. I prefer to back at a basic tier and then might raise my pledge later after giving it some thought. Impulse buying big rewards can become very expensive very fast. There are some games I have just pledged $1 for now and wait for them to go on sale after launch (Like being in a Humble Bundle). As others have said before, don't pledge what you can't afford to lose.
Second, I've seen posts about how some people have become addicts to browsing and commenting on Kickstarter. I've seen profiles for backers that only backed a few campaigns yet have made over 200?300 comments. I am also seeing more profiles with over 200 projects backed (The highest I've seen is a backer of 1301 projects). Looking at some of those profiles, I would say that Kickstarter addicts are willing to back some of the riskiest projects and could lose a lot if we start seeing a lot of projects start failing to deliver.