Flex metal servers
Flex metal servers are basically bare-metal machines, but you can have them available in the same amount of time as cloud servers.
You’d usually need to order bare-metal servers in advance. So say you have a free weekend coming up. You can roughly estimate how many players will come in, and order in how many bare-metal servers you’ll think you’ll need. Whereas flex metal, you can do this in minutes.
Flex-metal can be cheaper than cloud
It has the benefits of bare-metal, and can sometimes be cheaper than cloud. It can also be a good option if your server provider doesn’t offer cloud in specific regions, then flex metal is a good option to fall back on.