The 'official' statement is that he has been banned for harassment not for data-mining (it's not against the subreddit rules). Apparently, he kept tagging Haem quite often, posting about 'minor' bugs that don't really affect the game play. In addition, his posts had a touch of "being above Popcap" (according to one of the mods) because he kept pointing out their mistakes.
TL;DR: One of the mods got annoyed by his posts and banned him.
Btw, everyone who plays this game on Android (or knows someone who plays on Android and who can access the files) can do the same what he is doing. Basically, all you need is a little know-how on how to convert files to different formats and a text editor like note-pad or Microsoft Word. Personally, I don't think it's a bad thing to look at the 1s and 0s of any App and actually see what the app is doing on your device - as long as you don't change anything in the code to get an advantage in the game.
I thought I already added @MAGICDAVESHROOM as an approved user to ES subreddit but apparently I didn't. Anyway, you should have access now.