because it is TRUE PEER TO PEER, and thus there is no clear profit model behind it
The ability to profit from p2p networks and open source software (through micro-transaction fee donations) could be baked right into the transaction protocol, see
this for a related idea.
I like OpenTransactions, and I also like this concept. I can also write one or two LOC in Java so I will keep an eye on your GitHub repo.
the problem with OpenTransactions is it doesn't do what it claims. I spent several months working with the OT code.
the code will be in Java. Certainly you could get involved building out the GUI or related tasks.
There are profit models here, you could build the TXs to support TX fees, or get involved as a market-maker. For instance you could price and issue options, or you could buy credit risk.
I'll keep you posted on the progress. It's coming along. I've simplified a lot from bitcoin, and when you build in Java from the ground up it's much simpler.