Server FPS limit recommendation?

So according to this article, it recommends every server owner to cap their server FPS at 30 to save resources from the CPU.

https://www.corrosionhour.com/rust-server-performance/

But my question is, say I'm on a shared host, if I cap my fps.limit to 30 does it just give out all the extra resources to other users who are also on the same node? Or does it just save the resources for myself. I don't know much about how hosting works internally, but if anyone knows the answer to this please let me know. Thanks!

You should ask your host about this
I don't think you should limit it that hard. At least in case you are running only one server on VPS/.