There is PPC, online investment(hyip) and PTP.
First we will talk about PPC
Pay-Per-Click or PPC in short, is an effective marketing scheme for the Internet. If you have a personal blog/site that attracts moderate to high traffic, and you want to generate some revenue from it then PPC is a very good option for you. There are many companies, including the major search engines such as Google, Yahoo! etc. that offer PPC ad-serving applications for webmasters and publishers. After registering with the company, all you have to do is put some Javascript code or HTML in your pages and activate the advertisement. The company tracks how many times the ads have been viewed and clicked and makes your payment at the end of the month.
example of PPC is Google Adsense
Google Adsense
Google AdSense is the current leader in content-sensitive web-based marketing. Webmasters can place Google AdSense JavaScript code on their web pages in order to allow Google’s servers to show context sensitive advertisements (Google Adwords). Google uses their search engine ranking technology to decide what ads to show on your site, and on specific pages on your site. On a post about photography on your site, for example, Google might show ads for digital cameras. This type of targeting is very effective and results in good click-through rates in most circumstances. How much you can make with Google Adsense depends entirely upon the niche of your website. The more competitive is your niche, the higher the CPM. However, many web publishers have complained about Google’s terms and conditions of being too restrictive. As a Web site owner participating in AdSense, you are fully prevented from knowing which ads were clicked and how much each click brings to you. They have $100 payout policy, which means you’ll receive their payment only after the your revenue exceeds $100. Many publishers have found their Adsense account suspended by Google out of the blue, for reasons beyond their control. In spite all of these, for relative ease in use and targeting strategy, Adsense is the pioneer in PPC ad serving area.
