By placing an item in your cart, the company can tell that you’re in the market. This makes you an incredibly valuable potential customer, and it doesn’t want to miss out on your business. If you entered an email address, watch your email over the next couple of days to see if the company has taken the bait. And don’t forget to either follow through with the purchase or clear your cart after a few days so you don’t make an accidental purchase down the road.
Couchsurfing connects would-be travelers with hosts around the world who are willing to offer up a modest amount of space in their homes (not always an actual couch, though that is certainly common). As a matter of policy, Couchsurfing does not allow hosts to charge visitors money. However, it is common for visitors to thank their hosts by reimbursing the cost of groceries, or perhaps buying a gift equivalent to the extent to which they cleaned out their hosts’s wine cabinet.