$50 @staples gift card + $10 epromo card..hmmm 6/9-6/13-- what are the restrictions?

Staples: $50 eGift Card + $10 ePromo Card $50 for In-Store Purchases

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Staples.com is offering a $50 eGift Card + $10 ePromo Card for In-Store Purchases for $50. Promotion valid 6/9/13 through 6/13/13. Thanks techman01

 

My only questions are-

How many can you use?

Are there any restrictions?

Can I use it to purchase a VISA gift card?  If so that is like paying $40 to get $50--

Because in essence this could be a great deal if you were already planning to purchase something from staples this week.