This is a great deal but you must have a rewards card with any Kroger affiliate store.  Here is how to load $4 to your card for FREE!

Click Here to log in to your account.  As long as you have a card you can log in.  This link is for Kroger but if you shop, for example, at Ralphs then visit, etc.
Look for the ad that states Save More with Digital Coupons and click on it
Add any 4 P&G coupons to your rewards card - you do not have to use them.
After you have loaded the coupons a box will pop up asking if you would like to share this with 4 friends.  Put in their names and e-mail addresses and they will load a $4 coupon to your card that can used for anything!  

I just did it and it worked with no problem!