Nice article. I think its important to combine both qualitative and quantitative data when analyzing the reaction of your readers. Google Analytics is a great tool for interpreting user data into insights, but often times its better to talk to your audience directly to find out what they really think.
Machine Learning by Andrew Ng on Coursera is the best MOOC I've taken so far. It has great explanations on complex topics, fun activities, and a really well put together curriculum on machine learning.
Interesting idea. So it's essentially a marketplace for connecting business owners with a side project to marketers? What makes it different from a freelance platform?
"91% of customers want to hear from the companies they do business with." sounds like a bit of an exaggeration, but I agree - email marketing is still a powerful tool for engaging audiences. Looking forward to seeing how it evolves in the next couple of years.