Furthermore, Roblox pays extra Robux to developers whose experiences most successfully convert free users into ‘premium’ subscribers and are best at retaining users for extended periods of time, especially those ‘premium’ users. (a) the platform determines the level of remuneration of a user by setting rules which define the proportion of Robux a user gets from each transaction, and how many extra Robux a user gets for attracting premium users. (e) it can be argued that by ensuring experiences users develop cannot be exported and used outside of Roblox, the platform restricts a user’s ability to build a community or make money from their experience outside of it.