I am currently completing a doctoral dissertation exploring the motivation of addon developers for WoW, and as a part of the research, I'm hoping to get folk to answer some questions on a survey. The survey is located at https://www.surveymonkey.com/s/TRVV3HB, and is completely anonymous. The IRB at my university (Pepperdine) frowns on paid surveys, so I'm unable to offer any compensation for participation - sorry about that.
I'm happy to discuss my research questions with anyone interested - my primary interest is in what motivates addon developers first to develop addons, and then to share it with others. I've had the opportunity to interview a handful of developers (including Ackis and Kaeltan), and now I'm trying through this survey to further clarify ("confirm" or "deny" would be too definitive for social science research, which is notoriously squishy) the themes I've encountered in the interviews. The survey is 22 questions (mostly yes/no or multiple choice), so it's designed to be quick to complete. I very much appreciate any assistance folks who frequent these forums can offer - thanks for considering it.
I think you may have posted in the wrong thread -- this thread has nothing to do with addon licensing or the WowAce packager (which is what you're talking about, I assume) -- but the answer is no, the packager does not automatically add a license file.
You can add a .pkgmeta directive to tell it to output your project's license to a file, but be aware that it will just dump the raw license text into the file, and won't fill in the blanks, so you may end up with text like "Copyright (c) <year> <copyright holders>" depending on what's in the license you chose. Also, anyone who does a direct checkout from your repo won't get the license this way. Adding a license file yourself is trivial and does not have these downsides, so you're probably better off just doing that.