I agree, I might not use it, but it's a good example of a real world product that I can learn from. Quite often when I'm stuck on something, I look for OSS to see how they've done that particular thing.
I especially like to compare with complete solutions like this repo. Because sometimes I'm stuck in a rut and looking in the wrong layer.
Even if I don't end up using their solution reading through an open source project is, for me, a great way to think about the problem without all the pre-conceived notions I have regarding my existing code base.