i might be wrong here but it seems these are not resets of your weekly quota but resets of the Fable limit.
That means you can lift your Fable max 50% usage and you'll just end up burning through your quota faster. You won't have more tokens.
Yep I just burned a reset thinking i'd get a fresh weekly... Nope
"Weekly limit: gives you back the usage you’ve spent on Fable models"
This is what it says in the UI:
"Resets your Fable limit, and takes this week’s Fable use off your weekly limit."