^They're random codes like "FreeSwagbucks5" that you can use to get Swagbucks, by entering them in the codes box(The gear in the top right corner)
Codes are usually released daily
If you search "amazon" on swagbucks you'll see it! Just click it and then what you buy will be linked to your account if you're logged in.
Gurl, they should've done this during 2012!
Scott's Toiletry had this deal w/ Amazon where you took a quick survey and got $5 for MP3 on your account for Amazon, and I literally made like 50+ accounts.
Imagine the amount of SB I could've earned w/ each account