My games have made $663.75 so far on Kongregate. Makes for a nice bonus to the primary license, but it's far too little to be anything more than beer money.
Only Flash games pay anything at all. If you're making Java or Unity games, you'll make nothing (in practice, because they get so few hits).
Can you speak at all to how many hits you're talking about for the cash you earned? Tie ratios? Are you freemium or are you just collecting ad revenue?
Also, there are a few Unity games on Kongregate that appear to have a significant number of views like:
CS Portable - 9,182,664 plays
Red Crucible 2 - 3,411,238 plays
BeGone - 1,921,834 plays
King's Bounty - 1,811,971 plays
Freefall - 1,475,683 plays
Are these titles exceptions to the rule? How do "views" translate into earnings there?