More generally, if you are renting entire servers, you are not on the scalable part of the cloud. You are getting something much closer to a colocated machine than to a lambda, and paying just a 3 to 4 times mark-up over a rented server (where the owner will care about the hardware, not you).
And, of course, you have to compute your network usage on the cloud. It's almost certainly already included on the renting.
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Well, reserved instance means it's not scalable.
More generally, if you are renting entire servers, you are not on the scalable part of the cloud. You are getting something much closer to a colocated machine than to a lambda, and paying just a 3 to 4 times mark-up over a rented server (where the owner will care about the hardware, not you).
And, of course, you have to compute your network usage on the cloud. It's almost certainly already included on the renting.