I think it's an interesting to note that site visitors are seemingly understanding our product's value and utility better than before. I see it as 1 out of 21 people "got it" enough to win their vote, and by the 3rd go, 1 out of 7 people "got it" :)
You can't really conclude that from this - you submitted three different products at three different times to three different groups of PH users.
There's data you can use to measure the effectiveness and strength of your company - conversion rates to users and customers, revenue etc. Are you monitoring stuff like that?
We think their is a little bit of Kickstarter vibe in here, too. Users are indicating what they want i.e. the location requests. Just like people back a project on Kickstarter, users can essentially back on a product on Whttl by requesting that they launch in their city.