An another way of earning money online is joining affiliate networks online. There are lots and lots of website which provide this system. How it works basically is, once you join the network, you will be provided by a link, this link you can use for sending traffic to the website, sale of products from the website etc.. and you get commission for it.

There are basically three types CTR-Click through Rate, CPM-Cost per Million, CPA-Cost per Action, CPI-Cost per Impression, PPA-Pay per click. You can go through in detail on wikipedia.com on this link http://en.wikipedia.org/wiki/Cost_per_click

Now a days most of the webmasters, bloggers earn money online through Google Adsense program. You can just join as an affiliate if you have a good website or a blog. Once approved by Google Team, you get codes which you can keep on the website or blog. So when you receive traffic and visitors vists the Google Adsense’s displayed links you get revenue in your account. You can see there are huge number of websites displaying ads by google. Google Adsense works on both CPM and CTR. You can go through the website read more about it and join it.

Some of the good Website’s which pay good for their affiliates are as below

Casino Rewards
Clickbank.com
Bidvertiser

Many websites can be found when you google the words like Affiliate, Publisher, Partner, etc…