This is just wrong. Making this kind of letter open make MailChimp look like they are doing something wrong by charging for their services.<p>Not to mention their (antispec's) supporters are web celebrities that charge $500+ per day for their work. They can show their true appreciation and donate to the cause.<p>Hypocracy.
For a company that exists to stand up for people getting paid fairly for their work, it seems hypocritical to expect the opposite from their suppliers.