TYup, there are automated miniranks such as *sectionname* participant, they are added once a day.
There are also ocassional miniranks, you can get them during halloween, christmas etc.
Some ranks are buyable, you can buy them from someone else on Sythe
Some other ranks are added manually by admins for example 'I <3 N4N0' which is not tradeable and only n4n0 adds them
For minirank names + info if they're tradeable/stackable/available to get check minirank directory in user centre here: http://sythe.org/usercenter/
Perks->Minirank directory
You can also buy miniranks from other users,Prices range from 5$-55$.
Not all ranks are tradeable tho.
I got all my ranks by Extreme Homosex:Cheated on a competition I <3 N4N0:Sent n4n0 10 cents for gas. Spam Forum Participant:Posting Actively on spam forum Halloween 2013: Participated in a community event