I've noticed that old money types will tend to cooperate in this sort of publication-based dilemma more frequently for cultural reasons: to them, not cooperating would be a failure to show off their generosity.
To give a real life example, I've often seen my parent's friends "fighting over the check" when they all eat together, while I've never seen new-money-types of similar net worth do this outside of romantic contexts.
If it's worth saying, but not worth its own post, then it goes here.
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