No, the game doesn't use much data to play, even with heavy loads. All that passes back and forth are button presses and mouse clicks (with cursor position) for fights, motion, etc and after results are calculated on the server and messaged back as positions, special effects code numbers, damage, remaining life, etc. I. e short, brief text. Running in instances, where nearby player and NPC count is small and map area is limited the load is almost unmeasurable (or it takes a long while to get to 10mbytes accumulated). Running boss fights, where there are so many folks the lag shows up have more message traffic, but still small. It's still text, not art or software loads. The update that brought in the Halloween Festival was 325mb, followed almost immediately by another 150mb "fixup". Thus almost half a GB just for a Tuesday update, with which one could play daily for almost 2 weeks, or 2 times a week for an entire month. A a big TP update, with new art, will run a lot, and it's not even necessary to play the game. Just a waste of bandwith to some. If the content was new (like a fresh LWS part) you'll get a bigger update, and then a barrage of "new build available" for days or weeks, scattered all over the calendar. So updates are bigger, and with a run away frequency.