In larger companies, people work these kinds of extra "vanity hours" to make themselves look like a hard worker and win their large bonus at the end of the year

In larger companies, people work these kinds of extra "vanity hours" to make themselves look like a hard worker and win their large bonus at the end of the year - as in, tens of thousands of dollars. Not for some petty cash worth one day of salary. A development team can't afford for a single person to take a single day off? Something may be wrong here. If you're in a constant sprint, then you may burn out everyone fast. Or, it may be a sign that you have a weak handle on prioritization and putting in maximum effort for when it counts the most.