Today, 18th September, I received an email offering “Cashback offer: renew now to get 2 years of CCleaner Premium for the price of 1!”. It also said “Your CCleaner Professional Plus MD subscription with the following details will expire soon:” and had the line “Expiry Date: 6/9/2025”!
When I checked in the CCleaner program, it says:

The license key in both the email and the program are the same.
It’s a little worrying that whatever sent the email seems to have missed the fact that I have already renewed for 2 years and also seems to have treated 6/9/2025 as a date in September causing a renewal offer to be sent. I hope the software engineers who work on CCleaner itself are better than those who support the subscription software appear to be!