It would be extremely hard to classify a user as a gamer based off data usage and spreadsheets alone. The amount of time and data used a gamer on the average would expend is about the sane as someone who watches alot of youtube or Netflix for example. Like on my phone I watch alot of youtube. My latest data report for Feburary was 20 gb's of data which is alot for a hour or so a day. I bet my ps4 and pc gaming combined would equal that amount easy. Thats because both youtube and netflix eat ridiculous amounts of data these days. Thats why if you have a limited data plan you most likely avoid videos as much as you can. Nothing short of a voluntary survey asking if you game or not would be able to tell the difference. And even those are flawed. This will probably never happen and is probably being proposed by someone who thinks gaming is evil or something.