No, I agree. I had signed up to get the Mixpanel lifetime account. The next few months had stuff that didn't interest me, but were helpful enough that I would occasionally send them off to friends. Then it became online courses and get-rich-quick-but-not-so-quick-that-its-scammy types of things. I unsubscribed a little while ago.

One of the guys that does courses for AppSumo has a blog (http://www.nevblog.com/) and he often talks about churning out these courses. He's even got a course about building a course.