The only meals that should come with ketchup on anything are Happy Meals because ketchup is a child’s condiment. Holy §[¥#! Ketchup on a burger? Barfsville. Too think that poor cow died to have its corpse desecrated with such disregard.
To each their own.
I'm pretty big on mustard on my burgers and dogs, but am really very flexible other choices as well.
I go through a big bottle of this every few weeks.