Guest post by social impact journalist and filmmaker Melissa Jun Rowley (@MelissaRowley), creator of the upcoming series “Magic Makers.” Earlier this week, I was talking with a friend of mine who sold a fashion tech company in the early 2000s — before social media spawned copycat startups left and right, before TechCrunch made rockstars out of hot, young founders, and before corporations were seeking new ways to engage customers as forever faithful, digital brand ambassadors. “There are times when I…