How does this save Amazon money? Wouldn’t they always pick the optimal GB/$ DIMM? Do we expect half-increments to be a better value per GB? I would expect this

How does this save Amazon money? Wouldn’t they always pick the optimal GB/$ DIMM? Do we expect half-increments to be a better value per GB? I would expect this to only make a difference for dedicated server offerings, and I imagine amazons margins will still be the same on a per-GB basis.