It is now possible to export RM rules as JSON files and post them. Since then, there have been a few examples of people posting exported JSON that can be imported into RM to create a new rule.
However, the vast majority of posted rules are just screenshots or a text representation of a screen shot. These can be used to recreate a rule in another instance of RM, but cannot be directly imported into RM. The example linked to above had both screenshots of the rule and the exported rules as JSON to import into RM.
Hope this helps!
