Notices are posted here usually. Paramount shut down their channel back in January and they're focusing on their streaming service that they charge more for. A lot of broadcasters have shut down channels, or have announced the upcoming shut down of them. Definitely read through the notices.
As for Crave changing to Prime, I don't know. I know you can choose which premium service you want but I've never seen them randomly change before. You should be able to change which service you want to use under your account.
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