@3STTW
In the dark and distant past the Ft was actually negative (so it really was a discount), but the Ft discount of which we speak was for the last 3 months of 2022 when the Ft was officially increased to 0.98Baht, but there was a discount on that for low users (scaled for those using under 500kWh IIRC).
The discount ended at the end of last year so now everyone pays the full whack.
I'm interested by your note about having a 28-day billing cycle and getting 13 bills per year. Our man comes on roughly the same day each month (the 18th or 19th, except February when he comes on the 16th) we definitely only get 12 bills each year.