Wow! Multiple Profiles in Chrome (i.e. log into multiple accounts for the same site simultaneously)!

I run two small businesses and my own personal life.  I have 3 gmail accounts, 3 amazon.com accounts, 3 google calendars, 3 google drive accounts etc…  Google handles multiple accounts ok (but not Google drive), but Amazon doesn’t handle multiple accounts at all.  I need to log into all 3 Amazon accounts daily, finaly I looked for a solution and found this and ran across this little known feature of Google Chrome…  http://www.howtogeek.com/100999/how-to-use-multiple-profiles-in-google-chrome-like-a-ninja/  Now, not only can I be logged into all 3 amazon accounts in seperate windows, I also get a ninja in the upper left corner of the window!!