Ask HN: What motivates you to participate in any online coding challenges?

What are the things that motivate you to participate in any kind of online coding challenges or competitions on any kind of platforms that you know of? Is it the cash prize or the gadgets which you get if you win? Is it about something giving back to the community by learning more stuff and teaching others what you've learned? Is it just for networking if it's the offline hackathon? Or Do you really want to build a product that is loved by people and used by them?