Finally, I was able to buy all the stickers yesterday. I bought the first three stickers weeks before already but it was only yesterday that I decided to buy the bottom two. I was irked by the "Add Now" so I finally gave in and bought them.
Also, I think that you only get the Rank and Buzz info if you went up the leaderboard. However, I was down from 2 to 4 the past few days. I was curious why I got these and yet my status is the same.
My buzz is 104 but my rank is still at 4 and not 2.
I clicked those and shared them to Twitter, Google+ and Facebook but I only got 5 satoshis for each. I thought I will be getting really free bitcoins.
Also, if you comment on the posts about donations or payments received, you will get free satoshis too. I think some of you have noticed that already.