Someone asked me this, so I looked it up. It came out much higher than I ever excepted, so thought I'd share.
Before anyone freaks I want to be absolutely clear on a several points.
All NX purchases on here were direct cash from my bank account, not on credit cards, and all came after having paid all bills, after having contributed to my 401k, after having put away a specific amount in to my savings account, after groceries and even after charitable donations and came from my entertainment/mad money budget.
I do not advocate anyone spending this much money if they do not have it. All the other things I named should come first.
I wouldn't let myself buy NX for the first six months or so in Mardia, that's why it starts 'so late' for anyone who remembers exactly how long I'd been around there.
For the weird amounts that include change, it's because they came from entries where I was at target or cvs or w/e and grabbed something else with the card. Those something elses were never more than 3$ and do not account for more than 2% of the total but I can't be bothered to separate them out.
What's horrifying is I know there are people who spent more than me and probably still do.
Considering it didn't impact my quality of life, didn't distract me from my job, my bills, my family or other responsibilities, didn't prevent me from me doing other fun things (books, movies, going out to eat, general socializing). It was definitely more than I'd have spent on a subscription based game, and way more than free, but how do you quantify whether or not I spent "too much"?