Right, but after one of these big social platforms eliminates the other big social platforms, it will be in its best interests to stop providing RSS feeds because that will be an easy way to force more people to use their platform. (And non-techies will not take the trouble to post the same post to Twitter or Facebook and to a service that provides RSS.)

True but that doesn't mean your own service/whatever should only offer updates via facebook, instead of having RSS for your blog/whatever.

True.

I suspect some individuals inside companies are motivated to increase number of followers/fans, and figure an RSS option would dilute that figure. More likely, it's just ignorance ... Facebook and Twitter show you're down with the kids.