casual revenue

基本解釋

In this case, the Times seems to want both the traffic and advertising dollars from casual browsers as well as the subscription-driven revenue from the more serious readers.
《紐約時報》打的是這樣的如意算盤：從那些偶爾來訪的讀者手中賺得點擊流量費和廣告費，以及從相對忠實的讀者身上獲得訂閱費作為財政收入。

Mochi Ads aren't the sole source of revenue even for casual game developers.
FORBES: Casual Games, Hard Money
This is a valid point, but the problem is that this also allows big teams like AC Milan to take advantage of its large domestic and international fan base, and receive extra revenue based on casual fans who are not invested enough to follow the smaller teams.
FORBES: Labor Issues Dragging Down The Italian Serie A
Drawing enough casual fans to the web to replace the lost revenue of declining track attendance is an uphill climb.
FORBES: Churchill Downs Digs For More Derby Bets Online