The damping effect is that part of your costs are the hardware, space, depreciation etc. leaving that stuff idle costs money - so it makes sense to mine in the less profitable periods too.
Yes though AFAIK electricity is a large %
Crypto-miners are switching to AI token farming when bitcoin is low. They have compute that's both installed and powered, so why not do what pays better?
That depends on each miner's energy costs, so long as (variable cost of energy - revenue from coins) < fixed costs. It's still negative cashflow either way, but the monthly losses have to be weighed against the cost of going insolvent and losing the hardware.