CharlieCard is worth more than you think

I found this site randomly yesterday: http://www.mbta.com/riding_the_t/CharlieCard_Discount_Book/

Apparently you can get discounts by merely showing your CharlieCard. I put the link up on my gchat status for a while and saw that today BostonTweets tweeted the same site. I find it pretty amusing that we found it at the same time, then again, maybe one of my friends leaked it to him.

It has some deals that I would actually be interested in, but I feel like I might have to carry a printed version with me when I attempt to cash in on some of these savings. Who knows if anyone else has ever tried to use them...