Minted, a US-based online marketplace for design and art, which counts itself as a pioneer in crowd-sourcing product design through vote-based competitive challenges, has raised $41m in its series C financing led by IT-focused venture capital firm Technology Crossover Ventures (TCV).  Boutique investment bank Allen & Company and existing investor, venture capital firm Benchmark Capital both participated in the round, along with angel investors Kevin and Julia Hartz, co-founders of Eventbrite; previous backers of Minted include include IDG Ventures, an…