Ok. That means Polish coal producers are losing $140 on every ton mined
the producers are (almost entirely) state-owned companies (and not big capital or oligarch owned) and don't need to generate profit beyond what is necessary to continue operation, darling :)
Who pays for these subsidies
yes there are subsidies to coal mining in Poland (mostly indirect subsidies - like the subsidising of miners' pensions) - it is all worth it if you ask me - thanks to energy sector being state owned he have (in a sense used to have) cheap and stable electricity
as for retail buyers of coal, Poland allows for import from Russia and elsewher - that's one - two: coal heating is still the cheapest option if you live in the countryside and don't have access to gas grid (which is my case)