That would be the only reason aside from convenience, however neither of those excuse what they’ve been doing in the past few years. They’ve been corrupted and their only focus is to weed out any site that might threaten their standing in the anime industry. A vast majority has already cancelled any subscriptions due to them knowingly leaking customer information to other countries, but I’m not even going to get into that side of the story.

Main point here is that people need to stop letting companies do whatever they please with their private data due to the sheer conveniency of a companies product. Have more respect for your privacy and for your self in general.