Yes, they told the immigration officer they were coming to participate of an incubator, to one of the partners then officer asked him to show some papers and the demo. Again u have to remember u r not coming here to stay... Yet. U r here for the program, if u happen to be successful and then find the need to stay u will figure it out with the help of lawyers from the program, but for now focus on the problem at hand, been on the program
Probably not. The visas are for people who can show an intent to go back home. Starting up a company is one of the better examples of proving you're staying.