My all time stats from timeStats (chrome extension):
reddit.com
mail.google.com
google.com
youtube.com
facebook.com
redfin.com
docs.google.com
biggerpockets.com
ycombinator.com
craigslist.org
amazon.com
other
You ought to try out adwords. You can reach millions of people looking for a job. Test out dozens of catchy phrases.
And see what keywords are driving a positive ROI. You might want to also do some display advertising to drive traffic; the clicks are cheaper, but the conversion rates can be lower.
People have contributed lots of words. Ask a sorority president if you can give beta access to all of their members, send them all an email and see how 100 new girls use the app.
If you rely on HackerNews for your feedback exclusively, that is why you will fail.
I used to work at a big fashion e-commerce site, and this is the best advice in the thread. Don't rely on nerds for feedback on anything related to fashion. Try to get it in front of people who will actually be using it.
I would take at least half use it as down payments towards multi-family properties. Or find a commercial real estate investor and he may be able to lead you into some safe investments.
The ultimate is when you get a marketer who understands what APIs are used for.
For example, I can say that the OP should probably consider pasting his sample code higher up on the page in a more prominent position. Show the end user he can succeed easily with the product and he won't mind clicking the sign-up button.
Marketers these days also need to know where you can find these users. They should have an account here, SO, SlashDot, r/programming, Quora and so on.
