Can anyone answer this question: do referrals see any message when logging into their accounts showing the details of the shared satoshis amount made by their referees?
Yes, your referrals will see a message if you share some satoshi with them. The message will be displayed for one time only and it will disappear if they refresh the page. As far as I can remember, the message shows in a green box and it also display the amount which your referral will receive from the share.