The answer for me is simple:
If they offered 50% cash upfront and the remainder at the end of the project I'd consider it. Royalties and "pay at the end" is not of interest to me.
That's the way I work with my clients and it works out the best for everyone concerned. The 50% upfront shows they are serious and makes me complete the project for the other 50%. 5+ years working with that model and it works the best for me :)
*edit* plus the amount of cash would have to be worth it of course.
If they offered 50% cash upfront and the remainder at the end of the project I'd consider it. Royalties and "pay at the end" is not of interest to me.
That's the way I work with my clients and it works out the best for everyone concerned. The 50% upfront shows they are serious and makes me complete the project for the other 50%. 5+ years working with that model and it works the best for me :)
*edit* plus the amount of cash would have to be worth it of course.