Ruby module namespacing advice

in my current project have:

module Stats

  class Site
    ...
  end

  class Product
    def initialize(product_id)
      @product_id = product_id
    end
  end

  class Profile
    ...
  end

end

now in my Product class have methods to get/set product views(day, week, month) and methods to get/set product sales(day, week, months)

is better to namespace like Stats::Product::Views and Stats::Product::Sales or simply prefix methods like sale_add and view_add?

example calls with namespace:

Stats::Product::Sales.add(product_id) # increment sales counter 
Stats::Product::Sales.today(product_id) # get n. today sales  
Stats::Product::Sales.week(product_id) # get n. week sales  

Stats::Product::Views.add(product_id) #increment product page view counter
Stats::Product::Views.today(product_id) #get n. today product page views
Stats::Product::Views.week(product_id) #get n. week product page views

example with current structure:

Stats::Product(product_id).sale_add # increment sales counter 
Stats::Product(product_id).sales_today  # get n. today sales 
Stats::Product(product_id).sales_week # get n. week sales 

Stats::Product(product_id).view_add #increment product page view counter
Stats::Product(product_id).views_today #get n. today product page views
Stats::Product(product_id).views_week #get n. week product page views

Now, what you think is more elegant solution? and why?