I sell X products and have built a comprehensive portal around X products, eg videos, articles, forums, etc. A few weeks back I launched a facebook page where I would post articles, videos, info on X products. From this I'm getting around 200-300 likes a week. However to further improve the growth of likes im looking to have somekind of competition on facebook and give the winners free products. For example I could do: "who ever brings in 100 likes get a free products", but how do i track this ? Are there any other methods where I can give away products in return for many likes ? Ideas appreciated...