For the username, everyone (including users) is allowed one name change.
Presumably, Facebook can bypass these seemingly arbitrary limitations, but will essentially charge you for the right to do so (by requiring you to have purchased a certain amount of advertising with them).
I'm with you that F must have some restrictions on name change, but it does not seem reasonable to charge money for it.
[1] Imagine a page called "Sun Microsystems - Java" before being buyed by Oracle with a fer thousands fans. I'm sure a hight percent of the fans would not care of have a name change to "Oracle - Java" for example.
Well, apparently there is an exception from this rule. Obviously there is a huge potential for abuse when changing name of a page that has plenty of users. However, allowing only the "money making" pages to do so is a bit of an unfair move in my opinion. Reasonable but unfair.
I wonder if this situation will escalate and fb will publish some explanation. Nevertheless, it is still hard to believe for me that a company with such value would fake clicks at all or in a way that is easy to detect.
Anyways, I don't mind since I'm a small fish, but the longer this goes on, the more it will (hopefully, i might say) blow up into their face(book).
https://www.facebook.com/photo.php?fbid=10151098204101337...
After that, it's unclear.