Roblox allows all users to change their Roblox account's display name in the account settings without spending a dime. Here's how to do it.

How to change my username on Roblox? Changing Your Username (Costs Robux): Log into your Roblox account. Click on the gear icon located in the upper-right corner of the page to access the settings.

Rumours suggest Roblox will shut down on September 1, but no official announcement has been made by the company.