I am an active contributor to the Drupal community. I earn my living from Drupal. It's free to download and use and there are lots of good-hearted Drupal practitioners providing free support on the Forums & IRC. That is why I apportion some of my time to giving back to the community that has given me so much.

Contributed modules:

Tokenize Request Parameters

http://drupal.org/project/token_request_params

Other contributions

• Review contributed modules submitted to the CVS applications queue.
• Contribute to documentation pages in the handbook. Comments and direct edits to existing documentation.
• Provide support on the Support Forums.
• Frequent a couple of low-life dive bars called #drupal and #drupal-support (IRC)
• Test patches to core and contributed modules
• Provide Drupal Site Care services. Developing new Drupal websites, but more importantly providing post-deployment care and management of Drupal sites. Site Care goes far beyond traditional maintenance and includes continuous improvement methodology as well as ongoing strategic and logistical support.