But the USG will eventually sue you if you're making job ads that you don't want to actually be filled for the purpose of h1b / green cards.
https://www.justice.gov/opa/pr/justice-department-secures-25...
https://www.justice.gov/opa/pr/justice-labor-departments-rea...
https://www.dol.gov/agencies/whd/fact-sheets/62s-h1b-willful...