Piano, a SaaS platform for digital publishers including 1,300 media brands, raises $22M Series B to help publishers bring in non-ad revenue (Sarah Sluis/AdExchanger)

Sarah Sluis / AdExchanger:
Piano, a SaaS platform for digital publishers including 1,300 media brands, raises $22M Series B to help publishers bring in non-ad revenue  —  Piano, whose tech and services gives digital publishers a way to supplement their ad revenue, raised $22 million in Series B funding Thursday to expand …