Go for both. Some people will be more motivated by doing the right thing, some will be more motivated by making more money. The two are compatible.

Yes, it would be nice if (all, or at least enough) people were motivated by "doing the right thing" to fix things. Human beings being what they are, though, money as a motivator works pretty well.

I strongly agree with you on a personal level, but I also think there's something to be said for a non-ideological brass tacks bottom line approach (particularly in a community like HN). I genuinely wish that the ideological reason played well everywhere, but I'm not sure it does.

As another commenter has said: both are good.