Am I misunderstanding something here? Based on the AWS calculations on the Lambda pricing page, a single 256Mb Lambda would incur a cost of $2.7902232 per month, using "provisionedConcurrency: 1". Pushing it to 3008Mb, to get access to more processing power, makes that go up to $32.78 per month (EU London region).
Compared to the standard way of warming it up by hitting the endpoint once every 5 minutes, which comes out to 8640 calls per month, which costs next to nothing.<p>Unless I am terribly mistaken, it doesn't seem like allowing AWS to handle this and not doing it in code (warmup plugin, cron job, etc.) is worth the cost.