Recently a number of products have surfaced that allow users to find the advertisements and keywords used by top Adword advertisers. The idea is that once you know their keywords, you can simply start a campaign with the same keywords and wait for the money to start flowing in.
Unfortunately things don’t work like that in real life. If you start a Google Adword campaign by duplicating someone else’s campaign, you will soon see something very similar to the following.

Yes, you can try increasing the bids. After a few hours these messages will be back demanding more! Soon you will find yourself paying $10 or more per click!
Your campaign will cause the bids to go up for every one bidding on the same keywords. After a while you will cancel your ads because of high expenses and no return. The original advertisers will go back to where they were.
Successful Adword campaigns are not built in a day. These are the result of painstaking effort, analysis and tracking. More importantly you also need to offer something valuable to the site visitor. The original advertisers will be paying a lot less per click than you because their advertisements have proved their worth.
Here is a quote from Google.
“Quality Score for Google and the search network is a dynamic metric assigned to each of your keywords. It’s calculated using a variety of factors and measures how relevant your keyword is to your ad group and to a user’s search query. The higher a keyword’s Quality Score, the lower its cost-per-clicks (CPCs) and the better its ad position.”
So think twice before trying to duplicate someone else’s Adword campaign.