I've been nursing a minor Coke Zero addiction for years but usually get the store brand which is close enough at half the cost. For whatever reason Coke Zero itself dropped in price by about 30% recently but that's apparently not nationwide.
It really kind of blows my mind how much of that people drink. I'll get a 2 liter bottle that will last days and then I read about people going through entire cases of Mountain Dew Insane Flavor Combo Super Bacinator Blast in a day and it's like my god that's like 4000 kcals of corn syrup.
One confounding factor here is that oftentimes the price is only reasonable in bulk. I don't know about walmart, but around me the best deal typically is "buy 2 get 3 free". I rarely buy/drink soda, but on the occasions I buy at all I'll be getting many cases at a time.
I've had great results making my own mineral water clones though, so maybe I'll try making LabCoatz's coca cola clone syrup and see how it works with sucrolose or allulose.
5 years ago I think they were about 30c.
https://finance.yahoo.com/news/pepsico-cut-prices-eliminate-...
(The link is for PepsiCo but we all know that they all raised their prices together and will lower their prices together.)
Supply and demand.