This is basically an incentive to do KYC level 2, nothing more. You can't have a bonus or a reward for something they want from you, without doing that thing. They want to know your birthday and confirm it, and if you do that then they are going to give you some rewards, if you do not do KYC then how could they reward you for that birthday? Then how would they know your KYC at all as well. You give them the KYC they want, and they give you the reward you want, thats how it works. I personally feel like there is nothing wrong with that, I can trust Stake to keep this information safe and on top of that, my ID is not that secret anyway.
Your ID is maybe "not that secret" as you say but what about your address? Do you think it's safe to give your personal address to a crypto platform? Why do they need to know our address btw? In case of leaks, your physical address will land on the darknet. And any thug will be able to know where you are living along with your cryptos.
