What I see JD and HD doing is selling their items at non owned stores. IE walmart, you can buy shirts, pillows and even fabric in either logo. This gets the name out there, but I my opinon it would be better to get the customers into your own store so they might buy more of your products.
heres the link of the bike they raffled off to JD credit customers, yes I did enter.
http://www.deere.com/it_IT/images/library/news/2005/harley.jpg