No. The way I make the eggs the strong vinegar, sugar, and tomato flavors just drown everything else out. Their texture also changes and gets soupy with ketchup instead of creamy and spreadable, which is what I aim for. I could see it if people really hard scramble their eggs and don't really season them until they're mostly done. Otherwise, no.
That said, this is extremely popular worldwide, to the point that some cooks even mix ketchup into the eggs before scrambling them. Some of those recipes are good, but most times I'd rather just taste the omelet and its fillings.
