As responsible morally or legally? Their moral obligation would be irrelevant to them as a business, their legal responsibilities right now might be unclear. If

As responsible morally or legally? Their moral obligation would be irrelevant to them as a business, their legal responsibilities right now might be unclear. If SOPA clarifies it for them in a way that they think will improve their business it makes sense for them to support it on that basis. Perhaps the parallel you draw is useful, if a business is doing something illegal and someone demands that their yellow page listing be pulled so that the phone company is not seen as supporting the business and sues them to get them to do so is there legislation to cover that? Legal precedent? Remember the Crag's List flap over "erotic services"? GoDaddy does not want to be put in a similar position of having to decide between Legal/PR battle to defend their customers vs. just giving in. Maybe SOPA gives them that clarity?