Presumably, their career economists found that this "weird" pricing scheme is actually optimal—that selling tiny RAM upgrades for $200 or $400 is empirically, measurably an effective way to sort their consumers by purchasing power, and optimally drain their wallets.

It goes by many names, the "microeconomic pricing strategy where identical or largely similar goods or services are sold at different prices by the same provider to different buyers based on which market segment they are perceived to be part of",

https://en.wikipedia.org/wiki/Price_discrimination