A. EXTRA UNEXPECTED MONEY
-Bonuses which comes from your extra payout in the office or a good Boss
-A present , Maybe birthday present or just an ordinary money giving event.
-Money picked up on the street if you are born super lucky
-Money comes from winning a competition
-Bitcoin or Altcoin's sudden increase
A. EXTRA EXPECTED MONEY
-Comes from having a portion of your monthly salary
-Earnings from a business, part time jobs or campaigns
-Earnings from an investment
I usually gamble within the category A, how about yours?
Those are both "A" and you should edit it. I usually play when I only have the spare money to play with. Like if my boss games me some bonuses, with that money I can play some of it but not all of it.