Hotels.com Rewards is offering a nice promotion on their US-site. When you book a stay between June 1, 2020 and August 31, 2020 until May 24, 2020, you will receive 2 stamps per night instead of 1 stamp per night. Because of that, you can already redeem a reward night after 5 nights instead of usually 10 nights.
You need to book via the US version of www.hotels.com. Unfortunately you get redirected to the German website, but you can easily change the country in the top bar after.
It looks like the voucher code is only accepted on the US site. However, you can log in with your usual log in details.
You need to use the following voucher code on the website to make use of the 2-for-1 stamp promotion:
The value of the reward night is the average of the value of 10 stamps you have collected. With this promotion you will receive 2 stamps per night, therefore your 1 hotel night counts twice. If you start with 0 stamps, you will get a reward night after 5 nights worth the exact average of those 5 nights. This translates to a voucher code of about 16,66%. Please note that you cannot use a discount voucher code AND collect stamps. You can use the rewards night also for stays at chain hotels.
You can find out more about the Hotels.com Rewards program in this article:
You can redeem the coupon code underneath the final amount:
Afterrwards, you will see that you are earning the double amount of stamps per night:
The stamps are usually credited within 72 hours after check-out.