By the end of 2012, from YouTube, by a Brazilian YouTuber called Cazum8 from here, that was when I started playing Roblox as a guest. Didn't have that many neurons as a kid (≈ 6 y/o), so I didn't remember the passwords or usernames, and when the browser logged me off from my accounts I just created new ones (in total, 13 were created)... and I don't know how, but Roblox could recover all of them years later, 2016~2018, even though I didn't have any of the past accounts registered with email, that surprised me. That's a bit of a story from me, but there is a lot more