I want Hazel to add OpenMeta Tags to files in subfolders when they are added.

However this rule would need to be copied to every subfolder to work. And I frequently add new subfolders and remembering to copy over the rule is a pain I am hoping to avoid.
I tried adding the "Kind is Folder" combined with "Run rules on folder contents" as suggested in other thread but it doesn't work. Nothing gets processed.
I tried having it as the first rule under the main folder and as the last rule (there is only the one rule illustrated above in the main folder).
Suggestions?
All is help is appreciated.