Jumped On This Like a Hungry Dog = $1.5K in One Week
Denis YurchakFounder of Yadaphone $1500 revenue in 1 week
A post on Reddit…
The product is Yadaphone, and founder Denis Yurchak explains…
A week ago, I found out that Skype is shutting down, freeing up the niche of online calls to mobile. I was a Skype user myself, and I jumped on the idea like a hungry dog…
I built the product… in two days, launched it on Reddit, and got my first sale in two minutes.
Then, everything just started rushing forward like a wave that carries you with it. The product earned $1,500 in one week
Denis is an experienced software engineer, which explains how he was able to build and launch so fast 
But still a key takeaway here for the rest of us: pay attention to big shifts in enterprise products / markets.
There are often hidden opportunities within them to start a business or otherwise turn a profit 
Reminds me of a tweet from Spencer Haws a few months back, showing how Reddit’s stock was up 71% and it wasn’t hard to predict.
