I agree. I got one of those too and used it when we went to Vancouver Island, British Columbia, in 2012.There are times when you must furnish more than one form of identification.
I use my credit card size passport card.
It also comes in handy when I visit companies that I must be able to prove I am a US citizen before gaining entry..
It's only good for travel to Canada and Mexico but for the $5 extra they charge for it, it's a great second form of ID.