Hackathons may suit for students and who are still young and have much energy (no offense here).
its waste of time for me.
To learn something new, join sharing experience meet-up or short 2-3 hours coding only.
To make some interesting usable or continuable products, even 36 hours is NOT enough.
I prefer going to Gym, hangout, or socializing than burning out all of my energy :D
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.