Use this criteria if you're looking for a prolific contributor, someone who cranks out inspirations regularly or at least often.
You can specify the total number of mblogs posted to date, or the number of mblogs posted over the last 365 days. For new contributors, the total number of mblogs may not be that representative.
Tip: Use the "or" between the two numbers. That way, you will catch contributors who have posted often, perhaps over the years, as well as new contributors who have posted comparatively often over the last few months.