national chain. I think it stored the transactions for transmission, and in-case it didn’t go through we also had the imprints as proof of having the card at the time of transaction. I assume it processed them as a different option instead of instant approval, and probably has different liability implications if the transaction is later denied. Being a big company, was probably fine.
For others, I set up uBlock at minimum.
For myself uBlock + uMatrix.
If on a computer need more security uBlock + uMatrix + NoScript.
uBlock and uMatrix can block scripts, but I find NoScript’s fine grain control to be user friendly. Makes it a pain to browse the web though, until you setup each of your normal sites.