Facebook – How to you get Facebook to allow you more than 5000 friends

First, Facebook as a whole is more valuable if it maximises user volumes. So they're never going to stop wanting you to add that new friend from some other address book.

Second, the Facebook experience is pretty lame if you have only a few Facebook friends. So creating a new link may be a marginal value gain for you, but it may help the other party get into the sweet spot and become a regular and committed user.

More speculatively, Facebook ads themselves seem (from what I get offered, anyway), pretty feeble, so maybe there's an element of Facebook improving your general perception of the right-hand column by sometimes not even showing you some horrible, mis-targeted ad and just doing self-promotion, not caring all that much whether you respond. In this case, you've responded indirectly by talking about Facebook, I'm making a mental note to see if I am getting that same treatment, and we're both even more bought into the idea that Facebook is an unassailable, valuable site in a way that Myspace and other toppled social media towers must not have been!

It looks like Facebook has done another update so everyone gets more notifications. This thread on the Facebook forum has a couple of solutions suggested, this one seems to have the most love:

Go to the top of your screen and click the little globe symobol where you can view your recent notifications. Hover over one of the them on the top left and click the X. It'll ask if you want to turn off "top friend" activity notifications. Click yes. They will still appear in your news feed, you just won't get notifications for it all.

On a side note I think the icons you've circled in the first picture have more to do with identifying the notification than close friends (photos & status get the star, links get the pin).

Updated

Click the Notifications globe at the top of the Facebook window and when the drop-down drops click the Settings link (the little X's next to each notification have been removed recently). In the "What You Get Notified About" section, you can edit and turn off "Close Friends activity"