Suzanne also added in a blog post that "To grow so large in less than 5 years makes us proud and grateful to our wonderful fans. We look forward to continuing to expand our user base in many years to come! 2016 was a busy year for us. We expanded our team by three amazing people; hosted our first-ever Roll20CON; upgraded the FX tool, the API system, and the Art Library; signed a licensing deal with Wizards of the Coast and released three fully-integrated D&D 5th edition modules; and tons more—it was a blur!"
Roll20 frequently provides its usage reports, and about half the users on the system play D&D 5E.