If you have a "coming soon" plugin or your site "off line" for testing then the IPN cannot get through and you will waste valuable time chasing your tail figuring out why coupons are not automatically being sent out. If public cant see your site, neither can the IPN call.
Of course now it seems obvious to me, but hopefully this will save you from waisting even 1 minute facing this issue.
Of course now it seems obvious to me, but hopefully this will save you from waisting even 1 minute facing this issue.