Yes, you can use rust-lang/rust for commercial purposes. It's licensed under both the MIT License and the Apache License 2.0, which are permissive licenses that allow for commercial use, modification, and distribution.
The repository is not just a tool but a complete ecosystem aimed at empowering you to build reliable and efficient software, and it has a strong community around it.
While you have broad rights under these licenses, be aware of the following:
For more details, you can check the repository here. This active maintenance and large contributor count signal a healthy project, ideal for commercial use without significant concerns.