

The tendency of the rate of profit to fall will soon mean that an industry will stop producing said commodity. It can’t anymore if it’s unprofitable. This is where the state has to step in and start subsidizing that industry or buying the commodity themself in order to articially inflate demand in order to keep that industry afloat. See e.g. the “butter mountains” of the EU.
ahem i just so happen to be very familiar with the whole concept of the tendency of rate of profit to fall (TRPF) and you’re misunderstanding it here. it turns to be unprofitable in the sense that the profit rate approaches zero (for example, exponentially), it does not go negative! companies continue to produce stuff as long as the profit is larger than zero, which it always stays. so they continue to produce stuff indefinitely, according to the model. no state subsidizing involved here.
this is maybe a subtlety here. something can converge towards zero while also always staying positive. check out this function:






i do think that “voluntary” is a pretty clear term. would you still do it if it didn’t cost you anything, and it also didn’t get you any physical reward?