I'm mentioning pay cuts because one of the side-effects of joining a startup is that they can be tight on money and will offer early employees shares instead.

I work for a startup and am coding Rust and my salary went up by taking this job.

So I'm only saying this as a general thing; I'm sure a lot of startups where Rust makes a difference (I'm sure a lot of startups would be just as well off with Python), they can probably afford a competitive wage. :-)