People can start using the other network, and once supply of the original currency gets low there will be powerful incentive to do so.  We are starting to see that already to a certain extent with Bitcoin.  Nobody has studied the long term effects of demurrage.  Savings and loaning out savings are an important part of economic growth, demurrage provides a disincentive for this.  Also again the problem of the average person understanding this, and then wanting to pay just to hold on to their money.  I wish you guys luck, but I just don't see it happening.