But then I have no information and may very well be wrong.
I would guess he is using the IGG campaign to 1. fund the project for the minimum batch size required along with his personal/his company's investment, and 2. assess the demand and decide if more units than the minimum should be produced or if it would be too much of a gamble.
Same, I think Chenliangen already set the deal about production provided that the fundraiser would be a success. If there was some sort of other threshold to reach, this would definitely need to be stated in the campaign as one of the locks to break to make it happen, especially a hard and clear limit such as minimum number of units.