I may be wrong but I seem to remember when using MP previously there was a tool where you could draw a circle around a point on the map of a given dimension and ask questions like:
How many cistomers within this circle, toatl spend by such customers. There was no coding involved it just gave you the stats based on the data attached to the pushpins.
Am I dreaming .. or was it some other product?? Its the sort of function I wd expect.