Every product is different.
How much a game made is not really enough information. A game that makes $75,000 may sound impressive until you learn it cost $95,000, or it may be amazing if the person invested 400 hours and $50 in the project.
Those that operate professionally and do the important tasks of market research, of marketing to potential customers, and ensuring proper quality of the game tend to make quite a lot of money. The best product series I was on ended with a 62% profit over investment. Other projects of this type tend to range from a moderate loss to a moderate profit, depending on more factors than anyone can account for, including a bit of luck.
Those that are amateur tend to make no revenue. Sadly, most games fit here. These tend to have no market research, simply jumping in because the project looks fun. Marketing tends to be a few posts online about "I made a game!". Quality controls tend to be handing the game to a few people and asking for feedback. These products will sometimes end up with a few sales from friends and family. Considering the hours invested to make the game most of these tend to pay out at a few cents or a fraction of a cent per hour.
Products that work somewhat in-between the two tend to have different results.