Funny that in order to enter and include a screenshot, you need ten reputation points. Go figure.
You reach out and find a kind soul like https://stackapps.com/users/18/george-edison.
Good point - though some might argue that an app doesn't deserve a screenshot until it gets at least one upvote.
You have a valid concern though.
If you associate your account on stackapps.com with your account on stackoverflow.com (for example), you automatically get 100 rep (that's why I'm on 101 at the moment :)
I believe you just click on your username at the top, then on the "accounts" tab.
This reputation is no longer needed, to post images, as of about September 2013.
From hairboat♦'s answer on Meta SE:
The restriction has therefore simply been removed on all sites except Stack Overflow, Server Fault, Ask Ubuntu and Super User.