def remove_from_mailchimp( date_from = Date.new, date_to = Date.tomorrow )
  c = Devise::Oauth2Providable::Client.where( :name => 'Playboy' ).last
  os = Order.where( :client_id => c.id )
  ks = os.map( &:user ).uniq
  ks_scoped = ks.select{ | k | k.created_at.to_date > date_from && k.created_at.to_date < date_to }
  ks_nl = ks_scoped.select{ | k | k.newsletter }
  ks_playboy = ks_nl.select{ | k | k.orders.map( &:client_id ).uniq.count == 1 }# playboy orders only
  ks_playboy.map{ | k | k.newsletter = false; k.save }
  puts ks_playboy
  puts "#{ ks_playboy.count } playboy user unsubscribed."
end
# remove_from_mailchimp Date.today.beginning_of_month - 1.month, Date.today.beginning_of_month
# remove_from_mailchimp