>
doesn't matter in what currency their costs are, there is a curve of num_subscribers v.s. payment_per_subscriber and they need to be at the curve's maxima and that maxima would be different for each market depending on the purchasing power of the customersYou're describing a monopolist pricing model's revenue curve [1]. Let's complete the model. On the same graph imagine the marginal cost of providing the service (e.g. billing, customer support, peak bandwidth rationing et cetera). Subtract it from the revenue curve. You now have a profit curve. For SpaceX, if we dollar denominate then a rising dollar means the revenue curve moves down; if we local-currency denominate, a rising dollar means the cost curve moves up. Either way, symmetry. (Note: this works even if you assume zero cost elasticity, i.e. a horizontal cost curve.)
Thus, whether SpaceX is buying growth by losing money, hopefully in the short term; buying growth by making less money; or, as you suggest, increasing the quantity demanded on a unit-economically positive game is dependent on the exchange rate.
> already sent the satellites and you already employ the people who upkeep the infrastructure
These systems have marginal costs. Also, last I checked, Starlink has a pre-order backlog.
(My guess: churn is expensive for Starlink. Moreso than most telecoms. Buying goodwill and loyalty amidst rising costs of living is a smart move, despite it likely eating into margin. That or they're about to announce a massive deployment ramp-up.)
[1] https://blog.cambridgecoaching.com/how-to-determine-the-opti...