Just completed 25 Acoustic Tent missions and got a 100 starbits reward. It isn't much but who can complain when they get some free starbits.
The other thing is that I am trying to resist buying a new pack as I save up for buying some Epic cards. I am only maybe 2 or 3 missions away from being able to afford the card I have been eying. Excited!
But there's always the temptation of buying a pack and hopefully getting an Epic card that keeps sidetracking me. Not this time, though. If the xp boost from the Epic card is big enough, I plan to switch strategy to do music lessons till Level 55 which will then open up the Local Mini Tour Support mission.