This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
For easier distribution - it's just a single file to copy. We have a web app that has more than 34000 files; copying those over the network would take a long time.
It's also more orderly to initialize. The servlet engine knwos what to do with a war file, while if you copy individual files, it might try to start initializing the web app as soon as it sees the web.xml file, which may be too soon (because some files are still missing).