Why can't I give my QQ card to others for praise and comment?

Could it be that the praise was blocked? Business card praise will also fail, because you praise too much and too fast. When the QQ component finds that the user's operation is abnormal (that is, brushing likes), it will block the user's "likes" (similar to titles). The specific time is not specified in official website, and the maximum time is 1 month (usually 1 hour to 7 days, mostly 1).

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You can try not to praise others for a while, try to change the photo wall, signature and password, and try again after 24 hours.