Reject reviews receive discounts?

Hello
I am configuring the plugin to offer discounts to the buyers that leave their opinion about the product, but before its publication I have established the option to moderate the comments.
My question is, when does the discount coupon reach the buyer? Once you have issued the comment even if you are pending moderation, or once it has been approved by the moderator?
I ask this because it is possible that I not publish all the comments, but still wanted to offer the discount to those who sent it.
Regards