They say in business, a unicorn is a privately held company valued at a Billion Dollars. Retail-tech start-up founders Brad Moran and Nick Paech are still a little away from that milestone with their company CitrusAd International. But this dynamic duo is edging closer to the big guys of the online world - Google, Facebook and Amazon.  And the world's obsession with online shopping has made 2020 a pretty mind-blowing year for CitrusAd.