To encourage customers to open a mail offering them a subscription to home companion, a home furnishings magazine, the front of the envelope suggested that there was a gift inside. the envelope contained an attractively laminated bookmark. this is an example of combining direct marketing with:

To encourage customers to open a mail offering them a subscription to home companion, a home furnishings magazine, the front of the envelope suggested that there was a gift inside. The envelope contained an attractively laminated bookmark. This is an example of combining direct marketing with support media. 

Support media is media or items that is included to promote products or services. In this case, the laminated bookmark is an example of support media because it is being put in the envelopes to promote the product. They are grabbing their customers attention by "gifting" them with a promotional item.