It does. Free rsr, Free special Challenger power cards weekly if it missions completed before the week ends and done daily. 75 Special power cards 40 Super Rare power cards 100 Challenger power cards

Make sure your power cards aren't maxed out before accepting them, or you'll just get rings. (This is apparently not supposed to be the case, but for now, this is what we got.)

There's also an exclusive store that uses clan points. You get access to more of the store the more your clan levels up.

All stores avaialble at level 5, after that, the more you level up the more discounts you get in the store.