So there is a link in that Blog post (https://www.digitalocean.com/pricing/bandwidth/) wich got me thinking about the $.01 Price and the Bandwithpool.
1000GB Data consumption is 10$ (1.000 GB @ $0.01 / GB) but adding a Droplet for 5$ adds 1000GB to you Datapool.
So with adding cheap Droplets you could lower the Bandwith Cost 50%?