Hilton HHonors launched over the past week four separate WinBack promotions with variable number of nights and bonuses.
All the promotions are targeted and valid for registration until January 12, 2017. The required stays/number of nights must be consumed within 90 days of registration.
Here are the four different WinBack offers:
5,000 to 10,000 bonus points for a stay of two nights or more. The bonus amount is dependent of the Hilton brand you stay at
15,000 bonus points for a stay of two nights or more
25,000 bonus points for a stay of four nights or more
50,000 bonus points for a stay of four nights or more
I have no idea what targeting criteria Hilton HHonors uses when decided to whom they offer these. The promotion name implies that these are likely targeted towards members that have drifted away from staying at Hilton affiliated properties.