Valid points, I think a mix is important. The ratio is of course going to be subjective, and I can only speak to my own goals.

I 100% agree that for each platform that you should try to find a way to add unique value to it. That probably would have been a good section to add. For example, I am developing training courses for networking. As an added value to STEEM, I am posting my slides and scripts here and nowhere else. As soon as I get to a location suitable for recording, I intend to turn those into video courses and put them behind a paywall. I am also happy to engage anywhere here regarding the content.