I'm not sure what I was thinking, but now I would divide most of the examples from the social rule examples and put this yet farther off. The social rule examples seem much more clearly promoting the rules than the preference examples are promoting the preferences.

But "You break it, you buy it" is not a social rule. The speaker is not saying that of course everyone knows this is the rule, but saying that he has the right to set rules in this shop and that this is his rule. Of course, his right to legislate, and the reasonableness of this particular rule is itself a social rule, promoted by the statement, but that is not the main point.