A woman cleaned a house and became rich halfway through. Why? This is a rather interesting and mysterious puzzle.

"A woman cleaned a house and became rich halfway through. Why?" She cleaned Aladdin's house and dusted the genie's lamp...

Oh come on...

Most of these puzzles indeed have numerous possible answers. The hint that it's "halfway" somewhat narrows down the range of what could be considered the "right answer," but still, you'll likely be frustrated by quite a few alternatives. It makes you think outside the box and consider various scenarios. Maybe there was a hidden treasure in the house that she discovered halfway through the cleaning. Or perhaps the owner of the house was so impressed with her work halfway through that they decided to reward her handsomely. There are so many possibilities to explore when trying to solve this kind of puzzle.