Stamps?

[wangchawang]

I am having trouble understand the whole "stamp" thing. What I mean by stamp is the little images such as a the sythe verified lock and the pallet(see above). I was wondering because I had a blue party hat stamp, yet logged in the other day to find it is now missing. Anyone have this same problem or know how to fix it?

 

[Cas]

They are called miniranks.
The blue partyhat, or the pallet you have now are participation miniranks.
They are only awarded with activity per a certain timeframe. If you stop posting the required amount in that section, it will be automatically taken from you.