nit: "filing a bug" is definitely contributing. A well written bug report is worth its weight in gold and can get you started with the test case to write for the fix. alternatively, a one liner pull request that you have no idea what it's "fixing" is useless garbage.
I must admit I found the complaints about the license on my own project, which boiled down to you didn't make it freely available so we could steal it and use it for our own much better funded project without any cost, darkly amusing.
