I just read their about page, so I am not an expert on their business.
btcjam relies on some reputation scoring system but I didn't see any details in the "About". Not sure. TBH it seems kinda scammy to me. Not sure how you'd build a reputation system outside the existing ones (credit scores/criminal checks). Or for countries that might not have such a system in place like they suggest. Reputation systems can work, but they need time to build up data.
Once Bitshares had a reputation system in place, then perhaps this would be something for Bitshares. The other option as donkeypong pointed out is to sell shares in yourself.