For the high end restaurant clientele, the difference between 10 vs 20 or 10 vs 9 is not much (which is what 19.99 and 9.99 tricks are exploiting), and they are

For the high end restaurant clientele, the difference between 10 vs 20 or 10 vs 9 is not much (which is what 19.99 and 9.99 tricks are exploiting), and they are optimizing for time and optimal experience, because they have 'less' of that compared to their money. Also seeing the tricks like that is indicative of being lower class, because $10 or $1 prices differences matter at that level.