Maybe a slight exaggeration, but this completely caught me off guard. Charlie Card = Discount Card, and the discounts aren't bad at all.
"Just show your CharlieCard to save!
Take a look through our new CharlieCard Discount Book below - it's packed with deals you can't pass up - from arts and entertainment options, restaurants, retail stores, health and fitness services, and more! Plus, most of the listings are easily accessible by the T.
-If you don't have a CharlieCard, you can purchase a pre-loaded card here, pick one up from our MBTA Customer Service Agent, or get one at our T sales offices at Back Bay, Downtown Crossing, Harvard, North Station and South Station. And start enjoying great service and great deals while using your CharlieCard!"
And please no bitching about how the MBTA could have used the money elsewhere, it's likely this didn't cost them a dime.