safetyzone, these are problems with your BB that you need to deal with, yourself. Or yes, you will keep exchanging BBs every month.
Everything in life needs the proper maintenance. Your car needs gas, but it also needs oil changes and tire rotations now and then. Or with little warning, the car WILL quit working. I know the analogy is slightly lacking, but the low memory issue is really something you can control, so then you won't be so angry, and you won't feel cheated.
It's a great device and you need to maintain it.
What happens next is, you will have memory loss and lose your emails and all again, unless you deal with it. I can promise that.