Board Thread:Roblox help and discussion/@comment-44143780-20191110063246/@comment-35998649-20191110080641

Please understand what I'm saying. GoBlocks IS NOT OLD ROBLOX. It was one of three names that were thought of early on in development for Roblox. The names were:
 * DynaBlocks
 * GoBlocks
 * ROBLOX

They had GoBlocks for like a week, then switched to DynaBlocks (they ALSO had that for about a week), then ultimately landed on ROBLOX as the name of the game.

That image is literally GoBlocks, DynaBlocks and 2005 ROBLOX (before Minigames were replaced with places).

To answer your original question, most of the users just stopped playing Roblox over time just like anyone else would stop playing because it gets boring or life takes over (work, school etc.).