Lunar:
[...] for the security of all users. {+Wealth should not be a determining factor to access our tools, and we do our best to distributed them free of charge or at a fair price.+} We design, build, and deploy [...]
I think this rewording nails it on the head: the spirit that we (I?) want here in #3 is that we _should_ strive to make our tools as accessible as possible with regard to acquisition, use, and reuse: including (as Katie pointed out) the accessibility issue of cost. The Social Contract should encourage everyone who works on Tor-related projects to keep things like this (freedom of availability & accessibility) in mind. (Along with the other points in the Social Contract.) I think it does a great job at that.
Kudos to everyone who put this together and everybody who's been contributing to this conversation.