Tysons Corner touts the advantages of buying gift certificates online--you can save time and purchase them from the comfort of your PC--and it even advertises special benefits that can only be received with online orders, such as special shipping rates.
Tysons Corner offers more special benefits to those who don't order online. 
mnli hypothesis: Tysons Corner offers more special benefits to those who don't order online.  premise: Tysons Corner touts the advantages of buying gift certificates online--you can save time and purchase them from the comfort of your PC--and it even advertises special benefits that can only be received with online orders, such as special shipping rates.