Of all the colors, I would think would be the one to get the least amount of gold token generation. The color has no affinity for ramp of any kind. Even blue has interest in artifacts so that's something to attach to.

It's not really ramp; it's colour fixing at 2-for-1. Heck; it's Celestial Prism, only you have to exile a dead thing instead of using a mono artifact.

So yeah; I can just about see every colour getting access to it. I agree that white should probably get the least of it though.

Temporal, delayed ramp is still ramp. It's like a "Rampant Growth Ritual" that can also be used immediately to fix your mana, but that scenario I find less likely. Celestial Prism can never give you a net gain of mana on its own.

EDIT: It actually seems I should be using the word 'Accel' here. For some reason I tend to mix up these mana slang terms. Regardless, has traditionally has no accel capabilities either.

Well, it's never a net gain - it's storing mana for next turn; inefficiently. I really don't see that being a problem if every colour has access to a bit of it.

The sell cost being fixed at does seem odd, mind you.