Visa / MC are the ones who enable subscription scams and benefit from them. They implemented "convinience" option of "updating" your credit card data with replacement card. So even if you cancel and replace card charges continue to pass.
They also totally able to see all the places where your card been tokenised, but they dont push banks to expose this to you.
So... not dietary supplement companies, but a particular food that is completely legal and regulated as a food by the FDA.
You have a business selling food? Are you a bar? A restaurant? Well if you start selling this particular food we don't like, you will be debanked.
You argued that it was due to the prevalence of chargebacks but they already have a fair solution for that (banning vendors or simply requiring vendors to secure their accounts with collateral to manage that risk).