It might be useful for some money, if he's paying up front. But the equity is probably not worth anything. All they have is an idea. Their contribution isn't wo

It might be useful for some money, if he's paying up front. But the equity is probably not worth anything. All they have is an idea. Their contribution isn't worth 50%, much less 90% of the startup. If you want to start a startup, you are better off going to hacker meetups, or getting a job at another startup in order to gain more relevant experience and connections.