Although there are likely several reasons for this, and the sampling size might not qualify this asa statistically significant result, I would offer that if you approach a game with the idea of how to work around the rules of the game in increase your odds of winning while your opponents are simply following the rules, your chances of winning will dramatically improve.
This means from a tax perspective that there are issues on allocation of the royalties between principle and income, that some trust (such as marital deduction trusts) might not be able to qualify for a deduction if funded with copyrights, and so forth.