^ Actually, his specific method of payment for this film is irrelevant. Either way, the more successful the movie, there more positive outcomes there are for Card. There's always a chance sequels could be made. Additionally, and more importantly in terms of royalties, a highly successful film will raise awareness of his books (beyond the awareness associated with the film and beyond a mediocre film performance) - which will drive increased book sales for years to come. And so forth. Should the film flop, or even have an unremarkable performance, those positive outcomes will be less likely for Card.
All that being said, as I've mentioned before, the film's success hinges much more on the filmmakers themselves than on any decision by me, or any one else, who chooses not to subsidize it - and, by extension, Card.