Isn’t this a sign of a failing model, unsustainable growth? Likes on a page will not guarantee your post being seen anymore. I’ve found myself missing posts from pages I like and frequently visit. Why? Because Facebook is getting too crowded, a normal person can’t keep up with all that information she subscribed for.
For companies this means a problem since a like is not valued (doesn’t generate post engagement, clicks etc) as much anymore as 3–4 years ago. In that sense it was wasted money since it doesn’t give you a return anymore. (Here I would argue that in most cases a like for two years ago generated more value than its cost was.)
And this won’t get any better until Facebook-marketing’s efficiency is down to other channels’ or someone comes up with a newer better model.