If any platform either its reputed or not will not ask to their user for send money via any kind of social media. But unfortunately our greedy behavior can't control our emotion and eventually someone fall in their trap and that's how they become success on their scam plan. Every source of social media should verified from original website especially when you will receive any promotional offer like this. I know very well Ledger send mail if in case they have any promo, so don't send any fund to scammer.