I think for a startup weekend type event you have to define success as any company that follows through after the weekend and gets a non trivial amount of users

I think for a startup weekend type event you have to define success as any company that follows through after the weekend and gets a non trivial amount of users. Profits, in general, take years and may not be the best way to define success for startups (at least young ones). Profits should be the goal however. Getting acquired is a good measure but this too, typically, takes years. Issuing dividends...is just too far into the future for most startups.