Download profile pictures from Slack, use in combination with slack image scraper: https://gist.github.com/Christian-G/ccad3257e68c4b31d790c4ed66a51761

slack_download_profiles.rb

require 'open-uri'
require 'json'

class Profile 
  DATA = JSON.parse('<data object>')
end

Profile::DATA.each do |profile| 
  location = profile.last.sub('https', 'http')
  name = profile.first
  begin
    open("#{name}.jpg", 'wb') do |file|
      file << open(location).read
    end
  rescue
    next
  end
end