The concept of using the social graph to create a better dating app is certainly not extremely groundbreaking, but I'm curious about the naming. The claim that "Haystack is an extremely likely name for a dating app" is a weak one - the fact is that no one thought about it up until a few month ago. On the other hand - I doubt someone would just steal the name of a potential competitor. My theory is "unconscious plagiarism". Someone on that bus heard something about the original app, didn't really remember it, but when the guys brainstormed about the name - haystack popped up.