JAR Tokens t can be traded now: https://steem-engine.com/?p=market&t=JAR
You can send 1 JAR with a steemit URL in the Memo field to 
Steem Engine Tokens like JAR are now also listed on https://steempeak.com. This makes it easier to have an overview about your Token Balances.
There were already some JAR trades happening.
In short: You can buy JAR tokens now to get upvotes of