RAM is cheap to make (well, relativly).

Undercutting the competitors is done when a business is working close to cost and a slight anomaly (eg. competitor that doesn't have to make profit, is subsidized or is cheaper for some artificial reason) makes them go out of business.

A stick of ram, made for $10, that used to cost $20 is now $100 due to the AI bubble (numbers pulled out of my ass)... you'd have to bring the prices down to $15 or even less to make those companies fold, but you can earn much more if you sell your ram at $80.