I understand Drupal is licensed under GNU/GPL. I wonder if it is allowed to use Drupal as part of a commercial service. E.g. can we host a Drupal-based site as part of a service we offer our customers?
In testing 4.2 today, I was using the user profile module. Then I decided to write my own custom user data module, and stop using the Drupal supplied profile module. That worked fine, but in testing it, I was examing the database.