OVH and Hetzner could probably provide you with at least 100 top of the line servers within 24h (just guessed that, it's probably more). With a reasonable setup

OVH and Hetzner could probably provide you with at least 100 top of the line servers within 24h (just guessed that, it's probably more). With a reasonable setup, that's much more than any start up will need to scale.