As of September 26, 2019, Amazon Prime Video will no longer be available on Wii U. Members of the service have been receiving emails informing them of the news and offering $25 credit towards buying certain Fire TV devices. “We are continually upgrading our service and this occasionally means we can no longer support certain device models,” the email reads. “To help you continue streaming your favourite content, we’re offering you a $25 credit towards select Fire TV devices which will allow you to continue to stream your favourites from Prime Video.”
Source: Eurogamer.net
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