That would still be 86k req/day, which can be quite expensive in a serverless environment, especially if the app is not optimized.
Also for more context, this was the app in question (now moved to streamlit cloud): https://jreadability-demo.streamlit.app/
The whole 'cloud serverless buzzword-here' thing is ridiculous for most use cases.
Heck you can serve quite a few static req/s on a $2 ESP32 microcontroller.