63 000 000 was the amount I spent once on only Arsenal Packs and that got me at least half the UR weapons right there in one shot. So I say luck hasn't been kind to you at all.
I did it over the course of like 2-3 hours, with at least 3 quick breaks I think? Wish I knew where I put that paper with all my purchases as I marked each purchase like my final days in jail. If it was an ammo, it would just get a slash on the paper. But if it was a UR, it would get a slash with a tinny circle dot on it. Which gave me a nice visual representation of my wet and dry streaks. I also think after to much of a dry streak would be when I staged one of my quick breaks too? With an exit of the store. But all I got to say about that big spend is that it far exceeded my expectations, since it lead me to only 2-3 more days of playing to finally hit max manifest. I needed like 16 more UR, and it felt like the store gave em to me in only under 30 000 credits, since I usually played for about 10 000 credits a day back then. So yeah, maybe that take a break theory works? Because last 2-3 days I was spending the money as I was making it and it was raining URs. Last two packs were even back to back double URs. Couldn't of asked for a bigger finish.
But back to dry streaks, yep, they sure scared the heck out of me with that much money on the line. But whatever, good luck on the store making it up to you for such a dry run.