Remember that 20$ is a subsidized rate openai is currently willing to provide. Once that goes down you think these guys would be willing to pay token based billing charges ?
It is not going to go away. Rather they have doubled down and opened 399 INR/mo (4$/mo) plans that as of late have GPT 5.6 Luna.
The reason this works is that you get lesser inference time compute used for queries on these cheaper plans which makes it sustainable and this is enough for the tasks these guys do.
And some local telcos are bundling this subscription as well, so most people just get it for "free". For example, I get Google AI Pro for free with my 350 INR/mo telco plan.
subsidized versus API pricing sure, but do we have concrete proof of how much it is subsidized versus the breakeven inference costs of those tokens?