Do backers make money on Kickstarter?

I'm curious to understand, do backers typically make money on Kickstarter? I've seen numerous campaigns seeking funding for innovative projects, but I'm unsure if these backers are solely investing in the idea or if they're expecting some sort of financial return. Are backers essentially making a donation to the project, or do they have the potential to see a profit from their support? And if so, how does that usually work? I'd love to gain a clearer understanding of the financial dynamics involved in Kickstarter backing.