Complex sentence: FDN² indicated that it would channel donations through its "Carte Bleue" venue; according to Wikileaks Visa and Mastercharge are contractually bound to work with Carte Bleue.
Split into simpler sentences: FDN² indicated that it would channel donations through its "Carte Bleue" venue. According to Wikileaks Visa and Mastercharge are contractually bound to work with Carte Bleue.