Will I earn Bonus Points on Reward Stays with the “Go More Get More” promotion?
Yes – members are eligible to earn double Hilton Honors Bonus Points beginning on their second stay on paid portions of reward stays, including incidental charges (except on incidental charges at Hampton by Hilton™ , Tru by Hilton® , Homewood Suites by Hilton®, and Home2 Suites by Hilton®). Reward stays also qualify towards the 10, 15, and 20-stay thresholds for earning Plus-Up Point Bonuses.
https://hiltonhonors3.hilton.com/en/...faq/index.html
(I think it doensn't answer the 30th, 35th and 40th stay-question yet.)