I like the idea of that pledge but I think you should change 2 things:
- specify a time frame (eg. for at least 1 year)
I figured I would let people come up with their own routines. I once set myself up with a $100 per paycheck allowance of PayPal money. It was the setting up part that took the most effort. People will stick with it or not based on their own motivations.
- account for big changes in price (eg. at least 10 BTC or 100 USD worth of BTC).
If the price were to go up very high, then those who are in on the pledge would be in early and thus have some decent money to spend. Plus it might encourage people to get their 10 BTC for the month by selling things or offering a service.
Otherwise it is difficult for anybody to fulfill the pledge.
It is just a pledge. Nobody will go to jail if they waver from the exact wording of the pledge, just as long as they are supporting the original intent.
