The key takeaway from all this is that you should be an informed indie game investor. This applies not only to the concept of the game you plan to back, but to the actual people your are backing. Having a well thought out concept, a plan for development, and regularly interacting with backers are the signs of a funding campaign you can feel confident in.
Keep up with your investment, checking for major changes in plans and staff. Lastly, do some research. Find everything you can on the people who are making the game. Use Google's Image search to check the authenticity of artwork, making sure it wasn't copied from another site. Search for the developers on social media. If you can't find anything, contact them.
What other red flags have you seen for indie game projects? Got other advice for would-be game investors and backers? Let me know in the comments!