As you mentioned, Akamai is like a pseudo-torrent program Aeria uses when you download their games. Other MMO publishers use a similar program called Pando Media Booster. After it is done downloading, it will try to upload the file for others to download, similar to what torrent programs do.
It's been a while since I've messed with it, but if you want to check where it is located, go to Program Files/Common Files/Akamai and then run ControlPanel.exe. Under Preferences you can disable Uploads, tell it to stop running, clear cache, etc. Or, simply uninstall it if not going to download any other Aeria games. Otherwise, just disable uploading.