…more fancy such as using tar -X, which works for me. I’d never actually tried it before. The ‘weird globbing’ it uses is regular expressions, which are worth learning how to use. Run grep "$expression" $_tmpfile
where $expression is a line from your exclude file to see which files it’s going to match and exclude.
I bet you didn’t know that a metric ton was 1.1 billion times bigger than whatever non-metric ton they’re referring to.