Estimates are Subscription Site Insider's own based on weeks of research. We are *conservative* in our numbers, so it's fairly safe to say this is the low end of the possible scale. This does not include:

single-item content sales (such as an iTunes purchase.) additional revenue streams subscription sites also make money from (such as ads sold or branded event tickets.) non-content subscription purchases (such as SaaS, apps, or Internet access.)When we say "content", we include text, video, a...