Roku does not like being called a hardware business. Nearly 90% of revenues from the connected TV device slinger today come from the Platform segment, with Roku targeting TV OS domination and ad streaming supremacy. Few can argue against the success of Roku’s advertising business model, with financial and engagement results swelling across the board once again in the latest quarter – yet something still doesn’t feel right at Roku. With the recent and contentious arrival of Free Telly on the market, as a fully ad-funded hardware-based business model, this will have Roku executives mulling the future of the company’s devices business and TV OS influence. Active accounts are up 16% year on year to 73.5 million. Platform revenue grew…