First of what is Black hat and white hat?

Well, taken from wiki;

In recent years, the terms white hat and black hat have been applied to the Search Engine Optimization (SEO) industry. Black hat SEO tactics, also called spamdexing, attempt to redirect search results to particular target pages in a fashion that is against the search engines' terms of service, whereas white hat methods are generally approved by the search engines. White hats tend to produce results that last a long time, whereas black hats anticipate that their sites may eventually be banned either temporarily or permanently once the search engines discover what they are doing.

The basic idea is that, white hatters stick to the rules while black hatters do not.

This methods is somewhat considered black hat. With this you can make $20-100 a day on a daily basis. It might take a bit of your time to start, but once you do and have everything running nice and smooth. You will see results almost instantly. But like I said you have to do the work, this is not a get rich quick scheme.

Here Is What You Do

1) Pick a generalized niche that is fairly popular. Celebrities work well, cars, animals. Anything will do.

2) Make a list of 300 items in that niche. For instance if you pick music artists make a list of the top 300 most popular music artists.
3) Download at least 20 public use (no copyright) pictures of each item in your list.

4) Download or buy a screensaver maker. Just make sure it is quick and easy to create the screensavers (saves you a lot of time) and comes with an exe output function that'll easily install the screensavers on their computer without much dialog boxes or windows getting in their way. Here are examples of two screensaver makers; Easy Screensaver Maker Screen Saver Builder.

5) Create all your screensavers and put them up on a simple website. Give each screensaver its own page and download link. It also never hurts to SEO the site so it'll do well in the search engines and make you even more money later on. Adsense also doesn't hurt.

6) Signup with Luxecash or you can find countless other PPI (pay per install) programs online.

7) Talk to your account manager and ask him to bundle luxecash software with your screensavers. Send him all the installers along with a text file containing all the short descriptions and a sample picture. They are usually happy to do this for you. If they aren't get a new account manager.

Or you can use iexpress to bind it yourself (use start - run - iexpress, you can find detailed information on how to use this elsewhere online)

8) Get yourself a copy of Promosoft software submitter. I think it costs $95 for a copy but trust me its well worth it.

9) Follow the instructions on Promosoft to create the PAD files (product description files used for software sites) and submit each screensaver to hundreds of software and screensaver directories.

There you go. You will get paid $0.45 for every person who installs your screensaver. Once the screensavers are submitted you will have no problem getting tons of people downloading them everyday. If you get about 250 downloads per day (easy with 300 screensavers) you will easily make about a $100/day!

Another technique you can use is by binding popular download files with your PPI file using iexpress and then sharing the files on P2P networks or torrent sites, this increases your installation and revenue exponentially.

Find out which files are popular downloads, get these files, bind your PPI to it then re-release it. Every person installing the download will automatically install your file as well. Very black hat but it works great.

Here is an ebay seller that offers an ebook with techniques like the one above

Black Hat items on ebay