Hilton Honors members are currently able to earn double Hilton Honors points from their second stay for stays consumed between 06 May 2019 and 08 September 2019 (offer registration is required). Additionally, members are able to earn up to an additional 20,000 points depending on the number of stays they complete during the promotional period. Hilton Honors has just now announced the Power Up promotion that will run from 09 September 2019 to 05 January 2020 - members will be able to earn double Hilton Honors points (from the first stay) for all eligible stays consumed during the period and they will earn triple points (30 points per USD 1) if they charge the stay to an eligible Hilton Honors Credit Card. Registration is not yet open but I would expect it to go live in a week or so.
While there are no milestone bonuses with the newest Hilton Honors promotion, members will be able to earn double points (20 Hilton Honors points per USD 1) starting from their very first stay that is consumed within the promotional period. Hilton Honors Credit Cardholders will also be able to enjoy an additional 10 points per USD 1 spent on the card (base spend). This means to say that a Hilton Honors Diamond member will be able to earn up to 40 Hilton Honors points per USD 1 spent which is fantastic (especially after factoring in the the 14X points from the American Express Hilton Honors Aspire Card).
Unfortunately, there are no Hilton Honors Credit Cards available to residents of Singapore. On the bright side, we do get to enjoy the same bonus (additional 10 points per USD) when we pay for eligible hotel stays in Asia-Pacific with an eligible Visa card.
[H/T: John from LoyaltyLobby]