Well, it was increased for the holiday weekend, but even if you read the daily message in your image, it doesn't match what it says there. So who knows. Maybe someone changed their mind and just made it 10x instead of 100k. As for twice, did it actually apply twice, or is it just a glitch in the chat message?
You get 10k normally 15k with a second character on your acct. 100k with bonus and 150k with a second character on your account. It's 10x normal. Exp.
I was told once that the bank never makes an error in your favor. That's how I knew it was not a bug.