The Creating Keepsakes convention (for scrapbooking) offers online early registration for $6, on-site registration when displaying a downloaded coupon for $7, and regular on-site for $10.

The $6 online signup does not mention the $3 "handling charge" that is assessed when an attendee enters the registration process.

Once the 50% surcharge is counted, the discount is only $1.

Big deal.

I didn't check: I wonder how much the "handling charge" is for the $7 registration.