Thinking it over......I cant imagine ANY scenario where a character wiill refuse to sign if asked. Maybe theyre hoping it will cut time as some ppl will be satisfied with the cards, but I cant believe theyll say no to ppl who still ask - and the little kids with the custom made autograph books that was made specially made 6 months ago, who are SO excited for the characters to sign their books. Theres no way Disney would stoop that low, IMO.
And i totally forgot til DD reminded me - we did get the presigned card at H+V.......we threw it away and still got her book signed. It didnt even occur to us that the card was supposed to replace the autographs.