Notice they do say "get more", not "send more". Does receiving tweets use less data than sending them?I just saw a Vodacom flash advert that says: "Get more than 15000 tweets...for just R29...100MB".
That does seem very inefficient, sending 8745 bytes for a 70 byte tweet, but as you say:To send a tweet using half of the available chars: 8.54KB
Did you set your user-agent in your browser to one of a mobile browser?I have ofcourse left out the fact that they might be using a Twitter app - but show me an app that uses less than the mobile site and I will eat my hat.
Is my maths wrong? Have I maybe forgotten something?