I really do not think binance is doing a give away because if they are doing such, they could have sent mail to their users to take good advantage of the opportunity which could have increased more traffic to their exchange. Although it is festive season which most of the organisations do give away inline with the festivity to their loyal customers but in this case, the task you are talking about is the binance red packet task which they do regularly for their users so it is not a new thing.
To clear your doubt and fears, I would also advice you contact the binance customer care service to inquire from them to know if what you are seeing is genuine and not a phishing link sent to you because lots of such are sent to people on daily basis by hackers to steal details and information. I believe the customer care service are in better position to tell you what to do when it comes to their services.