Everyone.
Its not worth it to them. They are making money hand over fist with these services and they right them off. So there is zero incentive to keep the gear.
Sometimes we buy the entire system for a dollar if we can use it on our network. Meaning we built these data centers for our systems. If there is space in them we allow colocation of other companies gear. Its better than empty racks and we charge a lot.
And I would be interested on how they are referbing the equipment and selling for a profit. When its devalued to zero it gets messy w/ the tax code. Not throwing shade, I would rather go this way then the landfill but this is what I was told by the executives. Also liability, someone illegally dumps them and the DNR runs the serial numbers they come back to you.
I got in a ton of trouble when I recycled (for no money, I raged on this point) a pile of battery bank cells and didnt require the scrap dealer to list all the SN on the invoice.