[Grue3]

Because buying a product based on a 140 character description is a thing that should be encouraged.

[weavie]

By the looks of it, clicking on the link brings you to a page with a lengthier description.

[dmix]

You can see more information, select variations of the product ('red or green') and there should also be a link to the vendors product page as well.

The Buy button in the feed might confuse some users though, since it will likely open the information panel.