I get no tinder matches.. what's wrong?

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Hello,
I'm using tinder and hot or not right now for fun, but I just don't get any likes. I'm by no means a super-model.. But I hear people talk about tinder all the time and even most unattractive people get a lot of matches. I've never had a single fucking match and I've been playing it for longer than a few weeks now... Am I just very unnattractive or is this app worthless and not working?? I think I'd be at least a 5 and even if I wasn't I can't believe that 100 percent of all the people who see me swipe me to the left. I doubt if it's even statistically possible to be THAT unattractive.. Check out my picture and tell me what I did wrong: https:// www. facebook .com /photo.php?fbid=640286782679853&set=a.138605749514628.15910.100000956102350&type=1&theater
To see the pic, remove the three dots at the and and remove all spaces.