I knew I was getting close to 1 Billion C-Bills earned in MechWarrior Online because I was sitting at 398 million C-Bills when I started last night and I've been tracking my C-Bill earnings since December 2012.
So, when I broke 400 million C-Bills I went to my stats page and added my combined wins and losses and my Accumulative C-Bills Per Match to my C-Bills Analysis spreadsheet. I knew it was going to be close, but when I plugged the numbers in, I had actually broken 1 Billion C-Bills earned about a week ago (I only update the total earned number once or twice a month). :)
To put things into perspective, here are some stats on my journey to 1 Billion C-Bills earned in MechWarrior Online:
Matches played: 8,708
Average C-Bills Per Match: 116,567
Days Played with Premium Time: 227 of 448
Mechs with +25% or +30% C-Bill Bonus Owned: 15
You can also see my Mech Stats here. I own 63 mechs, but all are not shown due to owning a few duplicates or not ever playing some (I'm looking at you, Locusts) or since the stats reset a few months ago. The numbers don't match up perfectly with the numbers in the C-Bills spreadsheet because PGI started the Mech Stats section of our Profiles a few months after the Base Stats.