Not nearly enough people do, or they have no idea what it is if/when they notice it. But it's been on both Bittrex and Poloniex since I got into crypto about a year ago, and it's likely been the absolute fastest and cheapest way to transfer funds between the two exchanges the whole time. Unfortunately it seems a lot of guys immediately look away due to the word "pink" being feminine in their opinion, and there's also been a lot of confusion about it being "backed by Diamonds," which is NOT and never was the case. There's an article about the fake Pinkcoin scam here!. The founder of the real Pinkcoin replied to this reddit thread!(which references the article) with "the article you referenced it not us. that was a complete scam by some group who tried to use our name in an attempt at a money grab. We've been growing strong since out launch in May of 2014, they are no longer around."