Just crossed the 50,000 Starbits mark as I work towards another 10 + 2 pack purchase. Like I said in my earlier post, doing so seems to bring at least 1 epic card based on the three previous purchases. Hopefully it will be 4th time lucky.
What's helping the earnings apart from doing the quests more consistently has been the earnings being on the higher side of the band than usual. Most have been around 2000 starbits although there's the occasional one below 1000 starbits.
Not sure what that's down to but I think changing the band lineup has helped. Because prior to that, earnings were still on the lower side. It is not something i've experimented and confirmed but I'd definitely be interested to hear if that's the case for you as well.
At this rate, it should be another 10 days or so to the next pack opening. Fingers crossed.