Comment by keviv

Circa 2006-07, I made around $4k by selling Adsense coupons. I saw people selling these on SEO forums and thought that there must be a way to get them. A little googling and I found a way to get these $50, $75, $100 adsense vouchers. These would sell sell for anywhere between $5-$20. It literally was free money till it lasted.