Most definitely not. I don't even have a Roblox account, and I put in a random username to ask for 55,000 Robux. I then got this screen that's prompting me to add what I'm sure is some type of spyware or keylogger on my computer.

It's worth mentioning that sites that promise to provide free in-game currency for popular titles are usually straight-up scams, so it's best to just stay away from them.

Your best bet is to just shamelessly ask people to gift you in-game money for your various virtual activities, or simply buy it yourself or complete in-game tasks that'll earn you said Robux. There's a number of ways to do it. Is it as easy as some of the scams promote? No, it isn't, and if it was, it wouldn't be any fun, now would it?

Sadly, creating a display name doesn't earn you a ton of Robux, but at least you aren't tied to just your username forever, right?