There are some strange schemes in the world today, so we do understand this scepticism and the reason for this question.
For our regular writers, this clearly isn’t what we do. However, for the applications unfortunately rejected, all we’re able to say is that if we just wanted some copywriting for free, there are easier ways to get it, and it would probably be quicker to write the content ourselves. An awful lot of the applications we receive aren’t of a high enough quality for us to use, even if it is for free, so this sort of scam wouldn’t be cost- or time-effective.