From a company point of view, supporting CISA might well make sense in order to avoid the legal problems they are bound to have due to being coerced to cooperate with the government.

From a consumer point of view, it also makes sense to avoid "officially tapped" (read "US") services.

In the long run, it looks to me that gov't is laying the foundation of the demise of its own surveillance program because no one in his right mind would want his data in the US anymore, even less so if you're not an American company. Except for the German government, of course.