Serious question, does anyone really struggle with staying under their data limit anymore? I pay $28AUD a month and get 85GB, and I use about 20 of that per month?
There are other alternatives like Mint mobile, however they are also expensive. 10 GB costs around $20 monthly excluding taxes.
In short, Mobile data is too expensive in the USA.
There are other MVNOs that are even cheaper, for example Mint is unlimited (35GB of 5G then the rest on LTE) at $30 a month.