So, went ahead and signed the pledge because I'll do my best to spend 10btc whenever I have 10btc. Though, the part the confuses me is the "only if 1000 people do the same." Eff that. I'm going to do it anyways. I'm not going to help the community only if everyone else is.
I agree.
The 1000 people pledge gives incentive for other people to support it knowing that there will be other people supporting it and they will all have a magnified affect. Instead of just a few people "doing what they can".