FilterProxy is a Perl script that acts as a generic Web proxy. It is unique in that it allows you to install modules that can perform arbitrary transformations on HTML (or any other MIME-type) and HTTP headers. It filters ads by stripping HTML from the page, anonymizes requests by removing Referer and User-Agent headers, compresses HTML content, and de-animates animated gifs. Configuration is done via Web-based forms or editing a Perl data structure.
It's a well-known fact that proprietary=money. If you can lock someone in to your stuff, you can milk them for lots of money in the future. Open Source is fundamentally non-proprietary, and therefore, there is far less money to be made by selling software. Imagine every software company was open-source. How many of them do you think there would be? How many OSS programmers would instead be working for non-software oriented businesses, and maintaining OSS software their company uses as part of their job?
I figure an OSS world would support maybe 10% of the number of companies selling software today. (or 10% of the sales) What does that mean for an OSS software company today? If they want to compete with the big boys, they'd better not be depending on direct sales for their profits.
The future of OSS is not in software companies. It's in programmers, hired by companies to take care of the software they use. If you're working for a software company, times are going to be hard for the next few years, and the company will pull all kinds of tricks to make money off the software. And proprietary=money.