But with Iceland's ruling, "we hope that the European Commission also acknowledges that the economic blockade against WikiLeaks is an unlawful and arbitrary censorship mechanism that threatens freedom of the press across Europe," Assange said.
The verdict could also strengthen another WikiLeaks case in Denmark against a Danish Visa subcontractor similar to Valitor, the organization said.
Currently it is not possible to donate to WikiLeaks directly via credit card. In December, however, a new website was created by Pentagon Papers whistleblower Daniel Ellsberg and some other civil rights activists to crowdsource donations for WikiLeaks and three other organizations.
Neither WikiLeaks nor Visa could be immediately reached to comment on Iceland's ruling.