Damus used 35.4GB for me, and I barely use Damus when I'm outside. I literally open for 2 mins and close out (maybe it's still running in background? I don't know...) That is how I use the app most of the time - open, upload an image (some outdoor crap), and close. I may be underestimating the frequency, but it's certainly not like I would have used Twitter back in the day.