Me 'Earties
Not all treasure is silver and gold, mate
I believe that they never actually promoted refills on paper cups and it’s always a been technically illegal - but never enforced.
It doesn’t make sense to sell refillable mugs and give refills on single serve.
Just like pre-chip people would take old refill mugs and use them and convinced themselves it was ok. It never was ok...always forbidden but tolerated.
Things would always officially make sense from a business standpoint...if reality is there was leeway.
I believe you’re incorrect about the paper cups...but I’m basing it one my recent experience. In April, we grabbed a bite to eat at Gasperilla Grill at the GF several times, and we bought soft drinks with meals. We were told we could have three fills per paper cup. Regardless, the soda machine (the fancy Coke ones that allows you to pick from the various varieties/flavoring combos) would actually say how many refills were left on that cup. I distinctly remember that because I mix my kids’ drinks with seltzer to cut down on the actual soda and it counted that as two drinks with a single cup (I guess because I choose two different beverages?). Anyhow, the paper cups at least at Gasperilla a Grill allowed for three cupfuls