I probably will consider this, are they usually free and what exactly do you do there? Also get some websites with a portfolio because when it's time to apply like 99% will ask for a portfolio along with your resume.
For the most part they're free. From what I understand you just work on projects with others which you can add to your portfolio. It's nice having a site and all but working on open source projects is immensely valuable and of course working with others. I think the main reason to attend though is just to be in the environment and be surrounded with other aspiring and pro developers.
Like someone told me last night. You never know the next big startup could involve you. I don't remember exactly what the guy said but the gist is startup founders want to work with people they've worked on projects with. So for all you know the person you worked with at a hackathon may pay off now or in the future when they have a startup and want you because you've worked together. But yeah basically network and the best way to do that is work with people.
And in general if you wanna get anything you gotta hustle and put in work. For months I thought I had to do it all on my own. I now realize how dead wrong I was.