I guess this is a great opportunity for individuals to provide services like aweber, mailchimp etc. Think about it, now you don't need to worry about the hardware. Provide a killer interface, make it super super easy and have a low monthly fee and let the user pay the amazon bill. ofcourse there are multiple revenue models but now is the opportunity.
It is also now simpler to create competitive alternative to mailchimp as you can just focus on the user experience and features rather than delivery. Great opportunity for startups.
