I don't think they are going to dispose of these units I think they are going to sell them if they are no longer making any profit. It's too expensive to sustain a mining farm if you don't have a source to pay bills and maintenance.

I saw lots of sold units on Offordscott Telegram group, so I think some of these companies sold their units to offordscott  or used Offordscott as a broker or middleman.