You use them to bump up the ratings on things you like, add photos to messages, promote a posting, etc.
Make it rain.
Well, obviously you know, because they are also used to feature questions. Or did you casually click the box?
Probably buy virtual gifts/pictures and so.
Nothing really valuable.
Buy gifts for your friends.
use them to send pics to people or upload pics to your album and send gifts to people
send gifts to me
Use them to Ask Questions
No idea besides send pics it takes 6 tokens to do that...6 tokens to send a pic of a kitten crazy man