I'm leaving BTCJam forever, putting my money here was one of the many mistakes I made with my bitcoins that ultimately made me end up with 1/5 of the bitcoins I once had.
Here is the final view of all my investments there at the moment that I'm withdrawing the rest of the bitcoin that are left in my wallet, I don't expect to recieve anything else from the people who defaulted anymore.

I'm not saying that everyone is going to lose money there, this is just my personal experience using this site.
Thanks for sharing this, can you shoot us over an email to
support@btcjam.com so we can look into your investments in detail? I think you hit some good ones there but you put a lot into borrowers, especially if you didnt have all to much to throw at them to begin with. Sorry to hear you lost some of your total capital, but if you'd like us to look into this, gladly would. One thing I can say is that we recommend heavy diversification throughout many, many listings at a very small amount like 0.01/loan. This would hedge your risk a lot more.