Credit card stealing malware on Canada’s 1-800-FLOWERS website went undetected for four years December 3, 2018 https://techcrunch.com/2018/12/03/credit-card-stealing-malware-flowers-four-years/
You can bet your buttons that this business is only the tip of the iceberg. There is bound to be tons of others that are safely infiltrated already and still gone unnoticed that we will all read about especially after 2019 kicks in and some security contractor probes things only to find yet another clever player has had a two way street feeler resting comfortably within their money system funneling up a nice list of charge card numbers etc.