Does anyone really buy this? Why? Typically you know what clan your looking for, or what set you like best. What is the point of random 3 cards?
I think they should have it so there is a small chance you can get a CR in it. Like the whole database of cards are in it but CR's are 1/2 as likely as non-CR's to pop up. Still that would make it worth more getting it. Or if it was cheaper. But the CR thing would defiently bring down some of the insane prices some of those have and get a few more in circulation.
I believe Rainbow is there, because what was there before has gone away, and they needed a filler.
the Rainbow is also a good way to just get absolutely random cards...
so if you were to hold a random cards gift pack, you could do it that way.
but i don't see much practical purpose to get rainbow packs.