Agree with your points. Centralized networks such as Facebook can easily use Steem's blockchain to continue mining "like" data for themselves as well as reward the user with Steem. Actually, the only thing that holds them back from doing that is control of the data, privacy, and latency. But surely, networks with powerfully built-up network effects would splash into this space in a major way.

I did see steemtipper. Seems like a worthwhile venture to bring non-Steemians into the world of Steem and its benefits.