If you like the idea and concept, I encourage you to download the blockchain and get your own Joinmarket-maker script running. Estimates are that the avg. maker gets about a 1% annual increase in their coin. All you need is a computer that can run the script and bitcoind.

You can get the private keys for your addresses, so you are actually in control of your coins the entire time, unlike all other similar services I've seen.

In addition, you'll get that good feeling of supporting both the bitcoin network and Joinmarket!