Originally Posted by
Enigma368
...
My prepayment towards my google fi bill definitely qualifies according to the terms of the offer...
Are you sure of that?
Here's an excerpt from OFFER TERMS:
Additional terms and restrictions apply. Merchants are assigned codes based on what they primarily sell. A purchase will not be eligible if the merchant's code is not eligible.
So manual overrides are a favor, and may not continue indefinitely.