Define "substantial"? I've been involved with a variety of businesses that use Wordpress as part of their business, ranging from $xx,xxx a year businesses to $x

Define "substantial"? I've been involved with a variety of businesses that use Wordpress as part of their business, ranging from $xx,xxx a year businesses to $xx,xxx,xxx a year businesses. :) Also, by "run on Wordpress", do you mean "use Wordpress as their blogging platform and/or for hosting landing pages" or something more?