Why send the Turnstile bytecode encrypted ? Surely people savvy enough to abuse the system will find out how to decrypt it, see OP, and it gives the impression that you are trying to hide stuffs you're not proud about.
Because they want to make it as hard as possible to reverse engineer. If they wanted it to be easy, they'd use <input type="checkbox" name="ishuman">I am a human
Because they want to make it as hard as possible to reverse engineer. If they wanted it to be easy, they'd use <input type="checkbox" name="ishuman">I am a human