* perhaps they want to add their interests and likes to their profile, to show their friends what sort of music they listen to.
* perhaps they want to increase the like count of an issue they care about at a "single click worth".
* or perhaps they actually want to receive updates on the topic.
None of these automatically mean that they want to receive updates on the topic so much, that it should be among the top-10 news items of the day compared to their friends' posts. A "like" is much more effortless and not comparable to signing up for an email newsletter.
I don't see Facebook trying to make maximum money from pages with the newsfeed filtering, I see them trying to improve and spam-filter the content of the newsfeed for the benefit of the users. The "like-gate" scandal seems very similar to the SEO-community outrage every time Google changes their ranking algorithm - a community that forgets that if their pages got pushed down, someone else's probably more relevant page got pushed up.
I believe this is called insanity!
A direct email campaign would have been cheaper (MailChimp quotes <$2500) and more effective. Despite the social media hype, we keep seeing statistics that support direct media when communicating with existing clients.
Mark Cuban isn't God, I don't think this is a "huge" signal at all. IMO, Cuban's critiques of YouTube have been similar - which I feel have also been proven wrong with time.
They are doing it the wrong way, though I don't care to help Facebook so I won't comment here as to how they should be doing it.
The difference here is that "organic" is considered Google's and Facebook's best attempt to show their user what is most relavent to them. Some speculate that both companies are modifying these results to optimize paid results but there is no smoking gun that is true.
The bottom line is that people don't come to Facebook because of brands. Rather brands come to Facebook because that's where the people are.
The fact that at one point a business convinced a user to click a Like button does not provide anything approaching a symmetrical benefit to Facebook. Sure, Facebook is always happy to add content, but that marginal value of that content is nowhere near as important to Facebook as the distribution is to the brands. Facebook's primary asset is an engaged user base, and it's the social exchange that engages users. Meanwhile if businesses are pursuing any social media strategy, where can they get anything approaching the reach of Facebook? Even if another startup comes up with the reach, they'll be in the same monetization boat as Facebook and certainly will make decisions that piss off someone.