Following the successful mobile gaming application business model, ed-tech companies are starting to offer free services with paid upcharges. Consider Candy Crush Saga way of doing business. Anyone with a smartphone, tablet or desktop Facebook access can download the game at no cost. As users progress through the addictive, sugar-laden levels, they are prompted to make small purchases (usually between 99 cents and $3) to gain access to higher levels, add more lives or buy level “boosters” to help their luck. Essentially, that’s the freemium model in a nutshell.