So, now that the actual birthday has passed (12th May), so now what should be done, update birthday on profile so we can redeem points and can update it back to original?

Same here.No response from Asus side. Don't know whether there is any Maintainer for this forum as well or not. 

I love the Moonlight White Peripherals Collection because it offers a minimalist and elegant look, while also delivering high-quality gaming experience. The ROG Azoth mechanical keyboard, Harpe Ace Aim Lab Edition mouse, and Moonstone Ace glass mouse...

If by encryption you mean BitLocker, BitLocker encrypt is available for Windows Pro edition but the device comes with Home edition. 

You basically need to ensure that all details are filled and showing correctly on https://account.asus.com/info.aspx I hope this helps.