Over-promising is what causes crowdfunded projects to fail.
Let's say you want to build 30 $500 3D printers and do a 15k Kickstarter for the funds. And then you make 1 million! (and yes, this happens a lot)
Now you owe people 2000 printers. Instead of doing it in your garage on weekends with friends and family, you'll have to rent space, hire people, start an LLC, the whole she-bang.
The business model has completely changed but your price-per-unit didn't. Sure you get better economies of scale for components but labor (the real killer) is going to be far higher.
This is the point where poorly-run Kickstarters go 1-2 years over schedule and run out of money (since they're having to use money to build the business not the product)
Chuck is choosing not to have that problem (because he has plenty more just building games!) He may piss off people who don't get on the list, but more importantly he's making sure people who do get to put down money will get their game in a timely manner.
You can't compliment Spooky for succeeding thus far, and them beg them to make all the mistakes their competition has.