First, we are all users here. If you want to talk to Apple use Feedback.
Second, the only reason you are getting this message is that you are close to the limit of iCloud's free space. Apple provides a very minimal amount of free iCloud space which can be filled with a single iOS device backup and a little archived email. To stop getting this message peruse your archived email and delete what you don't need to keep. Emails you do need to keep can be moved off iCloud to your computer's storage. Stop backing up your iOS device to the cloud (if you have one) and use iTunes to back it up to your computer's hard drive.