It is a legal argument for liability. By reaching outside their own specialty, digging into the ethics & practices of their customers, and taking action agains

It is a legal argument for liability. By reaching outside their own specialty, digging into the ethics & practices of their customers, and taking action against them, they've opened themselves up to plaintiffs & regulators. In other words, if you touch it, it's yours. Putting themselves in the morals & enforcement business, it was only a matter of time before they were held to account for not doing a better job of it. A much stickier situation in front of a jury than being able to honestly state, "Hey, we just process payments."