> Some of it has to do with roblox being free.

This reminds me a of recent conversation I had with a friend about the success of Roblox. The big thing my friend said that Roblox has over Fortnight or any other gaming platform is ease of installation.

He told me how their young cousin came to visit and wanted to play Roblox. He told his little cousin he didn't have Roblox and that he would have to download and install it. The young child eagerly replied "It's super easy! let me show you!" So he let his cousin on to his PC. In less than 3 minutes he installed a small client, signed in, download the game files and was playing.

My friend was surprised and said Epic is struggling with this very problem and knows Roblox is successful precisely because of this ease of deployment. This is the same reason Discord is popular: you hop in, create an account and off you go. For Epic, Unreal Engine games are gigabytes in size and games are dependencies of other games built on top such as expansion packs. e.g. to play a Lego expansion pack game you need to buy and install the base Lego game. Roblox avoids this and the game files are small and fast to download.