About the ppc fee… Here’s an interesting company that i found: https://github.com/strawpay well their repository. Read more about the tech here: http://bravenewcoin.com/news/strawpay-tackles-bitcoin-transaction-woes/ Basically, even if open transactions don’t deliver on their promise of off-chain transactions, there will be other things catering to this need. I believe so because Bitcoin ain’t going to scale infinitly either.