I'm confused by your last line. Here in Australia, both the major pizza chains (Dominos and Pizza Hut) have full online ordering. Personally, I always use them

I'm confused by your last line. Here in Australia, both the major pizza chains (Dominos and Pizza Hut) have full online ordering. Personally, I always use them when ordering pizza. Is this a US cultural assumption? Or is there something else I'm missing?