I usually use NameSecure as my registrar, and every time I make a purchase I see there's a field where you can enter an "invitation code" and presumably get a discount on your order. I've never been able to find any invitation codes, either on coupon sites or through Googling, does anyone know where to look? Do they even exist in the wild?

Never heard. Maybe better get in touch with them and ask without hiding?

Even I haven't heard of Name secure coupons or came across the same... across various forms.

I think not only you and me, but no one have heard about the thing