Let's imagine that I had to make a website that could host a million concurrent users once per year. What do you think is cheaper, me acquiring all of the hardw

Let's imagine that I had to make a website that could host a million concurrent users once per year. What do you think is cheaper, me acquiring all of the hardware to scale to a million users and then leaving it idle 99.9% of the time, or outsource handling that peak traffic to someone who's already operating at the scale for it? The UK government does not remotely need the same year-round capacity as a top-tier CDN.