Wonder if that makes it cheaper than using on the sub (ignoring reset shenanigans)

I'd be very surprised if that were the case, unless they have severely devalued how much "100% usage" is worth – which, as I understand, they could at any point, given that they don't publicly specify how many tokens (or at least "credits" [1]) are included in each plan per month.

It really reminds me of pay-to-win games at this point: Two currencies (credits, tokens), both with a floating, intransparent exchange rate between each other and real money, random airdrops...

[1] https://help.openai.com/en/articles/12642688-using-credits-f...