[AdamTReineke]

Make sure you know the cost to serve that 2MB MP3, especially if you're go viral.

[wernah]

I quickly learned to set up AWS billing alerts, is there anything else I should keep an eye on?

[7moritz7]

There doesn't seem to be a ratelimit on your most expensive ressource, the mp3 files on AWS. I checked with cURL, you can do the same. For this web app you should ratelimit the ressource aggressively because of how the game works.

[654wak654]

You can also consider moving to Cloudflare R2 for hosting media [1]. Egress traffic is probably going to be your biggest cost in S3.

[1]: https://developers.cloudflare.com/r2/