The method is simple:
1. Create a landing page (single page website)
2. Create some BS report/e-book stuffed with affiliate links.
3. Go to http://paywithatweet.com and create a button for your website with a link to download the e-book/report.
4. Put it on your site.
5. Do some Search Engine Optimization/social media.
6. ...
7. Profit!

Then rinse, repeat. It's really not that hard to get to at least 100 USD per day. The websites' traffic rises and they go viral.