The Hilton Honors rewards program is offering an easy way to earn 10,000 points—worth roughly $50—without spending any money. The only requirement is that you have to sign up as a new Hilton Honors member and fill out at least one marketing survey (although the program also offers a range of ongoing surveys available…
source https://twocents.lifehacker.com/earn-10-000-hilton-rewards-points-by-filling-out-a-surv-1846575566