What and remove all the copper? That would take ages to do, surely?
There is some scrap value to the copper(*), although personally I don't think they'll bother removing copper from any ducts which are also carrying fibre cables - too much risk of damage for too little return.
However the cabinets will surely go in the end, if only to stop paying for the mains power connections.
(*) Back-of-envelope calculation:
- one strand of 24 awg has a cross-sectional area of 0.205mm^2
- a one metre cable with 100 pairs of 24 awg has a volume of 41000 mm^3, or 41 cm^3
- given a density of 8.96 g/cm3, this makes 0.367kg of copper per metre
- at a scrape value of £3 per kg, that's about £1.10 per metre of this cable