Here are brief risk descriptions of both Methods:

Risk for Method #1
You may not be able to sell products you bought at bulk.
Solution: Always research the supply and demand market of that particular product thoroughly before putting your money to work. Statistical data are usually provided by the auction sites for sellers to analyze the buying trend of a particular product. Find out the price of the item people are willing to pay for. Try to avoid items with low values.

Risk for Method #2
Cost of advertising greater than profit. In other words, you spend $500.00 in advertising but only managed to generate $300 in sales revenue.
The product/service sales page where you sent traffic to may not convert sales well.
Solution: Like Method #1, you’ll have to analyze the supply and demand market of that particular product/service. But this time, you’ll be using data provided by the search engines. Contact the original merchant on their sales performance. Get estimates for sales over x number of visitors. Anything below 1.5% will not be a good product or service to promote.

“Making easy money” opportunities contain risks. You either get scared off by the potential loss you may incur or look for solutions to minimize the risk. For Method #1 and #2, there are very good solutions to minimize their risks. You just have to find em :)!

How to Promote Your Adsense Niche Site

Blog and Ping: Create a Blog you can install the blog on your own site or use a free blogger tool like blogger.com . Update the blog everyday with content specific to your niche and a link back to your niche site. Ping the blog using a free pinging service like pingoat.com . This will update several services about new content at your site. The Search Engines will spider your blog and find your site.

Find other blogs related to your niche. Do a search on blogger.com for blogs related to your site. Leave very relevant comments with a link back to your site. Again people and the search engines will find your site. Do not leave worthless and spam comments on other blogs. Be a benefit to the blog community with good information.