They are not losing money, they get the block reward to sell. This in turn makes all Bitcoin users pay indirectly due to deflation but that is currently not vis

They are not losing money, they get the block reward to sell. This in turn makes all Bitcoin users pay indirectly due to deflation but that is currently not visible because there is money flowing into the system. But you can just do the math for yourself - the network hash rate is currently 3,160 petahash per second, 300,000 transactions are processed per day, an AntMiner S9 - the most efficient currently available miner as far as I can tell - consumes 98 joules per terahash and you can buy electricity for 5 cents per kilowatt-hour. With this numbers you end up at 1.24 Dollar per transaction and that is as optimistic as it gets when looking at electricity costs. Then add costs for hardware, rent, cooling, labor, profits, ...