I just received the below answer - are you saying, that if I switch to monthly, I can apply the coupon?

Hi there,

Thanks for reaching out to Humble Bundle Customer Support. Unfortunately, this particular offer is not available to 3-month plan users, so it looks like this was misrouted to you. I'm sorry about that!

I've alerted our marketing team so that we can look into ways to make sure we send the coupons out correctly in the future.

EDIT
Well, that worked... I changed my billing cycle from 3 months to monthly with the warning that I will not be able to go back to 3 month cycle. After that I went to claim October's games and was charged $6.

what a mess!

Ashe (Customer Service)
Oct 12, 2021, 12:06 PM PDT
Hi there,
Thanks for reaching out to Humble Bundle Customer Support. This particular coupon does not apply to the prepaid Annual Plans. I'm sorry for the confusion!
I've alerted our marketing team to the issue so that we can better route coupons in the future.
Please let me know if you have any other questions. Take care,

-Ashe
Humble Bundle
http://support.humblebundle.com/

Translation
Oh you are one of the idiots who pay upfront, sorry, no discounts for you f*** off

I'm having the same situation, pausing for the month (classic) while still having lots of month remaining (yearly plan). If I took the coupon, will my remaining months will be gone ? or my yearly will be switched to monthly ? so confusing ...

*edit
just received email from Humble Bundle team, its a no for prepaid annual plans :/ why bothered sending me those coupon.

"
Thanks for reaching out to Humble Bundle Customer Support. This particular coupon does not apply to the prepaid Annual Plans. I'm sorry for the confusion!

I've alerted our marketing team to the issue so that we can better route coupons in the future.

Please let me know if you have any other questions. Take care
"