I don't think it's 250 seats, but 250 employees. Lots of fairly low tech businesses (such as restaurant or retail chain or universities) may have less than a dozen docker users but still cross that total threshold.

well it is AND: "AND less than $10 million in revenue"

basically most companies with ~50 people probably has 10 million in revenue (annually). considering wages and buildings and stuff you need for 50 people...

Businesses that would knowingly risk this? Small.

Businesses that would unknowingly risk this because some engineer just went and installed Docker Desktop because they couldn't be bothered chasing this through management and procurement? Well..

Maybe this is common knowledge, but I saw an ad recently for a company that offers money to snitch on your employer for using unlicensed software, or not paying for free-for-personal-use" software