well correctly noted. now before you choose any product or service, just go to the Internet and start looking for reviews. this strategy is used by most people. I think your product will fill up the reviews and will be useful to society
The product has been running since 2015, currently they send about 300 feedbacks a day and has many possibilities to grow a lot.
payment will be only for useful reviews? and if I write something bad about some product, I will also be rewarded?
No, all actions are rewarded and valued. Some may have no value for how the platform works, but i think you have all the information in the whitepaper.