Club 1909 lets you collect points for things like watching games, going to games, tweeting/posting on FB about the Habs. Those points can be traded in for all kinds of uniqze things, e.g. last time I checked they had custom wallets with pieces of game worn gloves.
You can take a look yourself, joining is free and quick. But for me who's not big on social media it's not worth it.
Only perk of the CC is that you can redeem your points for Habs merchandise (among numerous other things): Jerseys, gift cards etc. Nothing you can't get cheaper on the Habs store.
Other than that it is a pretty standard credit card that just looks cooler than any other.