The primary will almost certainly be de facto decided by the end of March. There's a good chance it will be de facto over by mid February, if any candidate dominates the early states.
Of the 2467 delegates up, 1250 of them will have been distributed by March 12. Republicans rules on delegate distribution heavily favor the candidate in the lead as well. No primaries/caucuses have been scheduled yet after March 12, but expect the bulk of the remainder to be in the other half of March and all of April.
The primary is all but certain to be over by May 2024.
Streaming services have an enormous amount of fixed costs. It might cost them several billion dollars/year to operate the necessary infrastructure even with zero customers, but the marginal cost to serve a customer might be on the order of $2/month on that $10/month subscription.
It's why streaming and digital storefronts are such a sink/swim industry. Either a company gets over user number+sales threshold to override their fixed costs, upon which they become profitable and all further growth makes them exceedingly profitable. Or the company fails to do so or barely does so, and makes somewhere between giant losses to minimal profits.
From a quick search, Spotify's user count should have grown somewhere in the neighborhood of ten times over since 2015.
This is not a cost increase that is mandated or justified by inflation. It never is. It's a cost increase from a very, very, very simple fact: companies want profit, and Spotify's leadership has concluded that they will gain more profit by increasing prices than they will by not doing so.