It's probably because they are running the 2 sites while not devoting a specific team to MP. I think SB is the main focus, and they try to mirror SB on MyPoints.
It's pretty disappointing. I really don't want to see the points needed to redeem increase either.
Them buying up Inbox dollars & MyPoints (after absorbing Send Earnings into InboxDollars) makes me think of Microsoft buying up their competition & then phasing out the other companies