Until the rug inevitably gets pulled on those as well. It's not in your interest buy a $200/mo subscription unless you use >$200 of tokens per month, and long term it's not in their interest to sell you >$200 of tokens for a flat $200.
This is only true if you can find someone else selling them at cost.
If a company has a product that cost them $150, but they would ordinarily sell piecemeal for a total of $250, getting a stable recurring purchase at $200 might be worthwhile to them while still being a good deal for the customer.
I don't see how it matters to you that you aren't saturating your $200 plan. You have it because you hit the limits of the $100/mo plan.
There is probably a lot of value in predictability. Meaning it might be visible for a $200, to offer more tokens than $200.