That's bizarre. RAM is relatively expensive and has long been a substantial cost of the computer. Not like CPU binning where it really can be cheaper to sell you the faster processor and lock it to behave like the cheaper one.
I vaguely remember some Sinclair computers doing stuff like that because they used cheap RAM chips that were ensured to be error-free on the entire memory-space (so basically binning) so they used the "good" half, but a lot of the time the "bad" half was also fine?
