Can you give more details on how you want to protect people's anonymity and find out what they want most, consume?
If possible, your project might spark the interest of big business, even google! Because it's very annoying even this surveillance and control that try to print us! Good luck.
The anonymity are created by several parts:
1. User gives only that information that he wants to. Such as age, profeesianl sphere, hobby, preferences in food and clothes. But the platform doesn't need his name, photo, pasport data. The information is limited by the user.
2. User choose iny that researches that most suitable for him and he doesn't ans for the question that he don't wants to. The history of users participation is avalible only for researchers in research time limit.
3. For rewards use only cryptocurrency wallets. As we know it's consist from digitals and letters in contrast to any other web-wallets that usually use private information.
You are about big business. It can be interested for the big business forst af all. Such companies as Toyota Motors, Volkswagen, Nestle, Coca-Cola, Google, Amazon, clothes corporations and magazins can make a reseach in any point of planet for several hours to find out what the customers wants to consume and optimize their produst line. That will minimize their expenses and the price could be lower for cunsumers.
But small business and startups also can make the research in thier own city or region to know the opinion about their idea and products.