Survey Junkie is legit and you can make some money taking Surveys on Survey Junky however you won't get rich or make more money than your day job.
I take online surveys through Survey Junky when I have nothing else to do and have earned $100.00 per month doing the surveys however it's not very easy to make that money.
So don't expect to quit your current job and make money online solely by taking online surveys.
Survey Junky is legit and does payout but most people give up before the payout is ever reached.