But you are still looking for a developer who will make a platform for you based on some of your ideas, and he will pay for his efforts by waiting in the future for the platform to start making a profit. All on the condition that you want to share the profit.
It is clear that it would be stupid to publicly share ideas and information important for the project, but it is equally stupid to expect that, based on what you have found, you plan to find a solid developer who will invest his knowledge and time for you without any guarantee that he will be paid.