Yes it will be a lot less than 30k unique visitors but don't take the 1 million+ alexa rank too seriously. In this case it probably just means that a lot of the

Yes it will be a lot less than 30k unique visitors but don't take the 1 million+ alexa rank too seriously. In this case it probably just means that a lot of their traffic are non-technical users that don't use the Alexa plugin. Just installing the alexa plugin in their own browsers could get their alexa rank to 700,000. Just speculation from my experience.