Exactly. The way that Doctorow puts it in his book The Internet Con, it's actually perfectly legal to use a trademarked name, so long as it is not confusing to users/consumers. An example he gives is you couldn't open a rip off McDonalds where folks mistakenly think they're actually going to eat authentic Big Macs, but you could open a restaurant call Better Than McDonalds. This agrees with the first quote of the article:

    The most basic rule is that the Rust trademarks cannot be used in ways that appear (to a casual observer) official, affiliated, or endorsed by the Rust Project or Rust Foundation, unless you have written permission from the Rust Foundation.