From an email sent out by the Amazon Associates Program to California affiliates: For well over a decade, the Amazon Associates Program has worked with thousands of California residents. Unfortunately, a potential new law that may be signed by Governor Brown compels us to terminate this program for California-based participants.

It specifically imposes the collection of taxes from consumers on sales by online retailers -- including but not limited to those referred by California-based marketing affiliates like you -- even if those retailers have no physical presence in the state.