why do these roblox accounts have the SAME USERNAME?

yes. fave investigates these rare roblox usernames that all have the same name what?---------------------------------------------------------Subscribe!

If we delete our Roblox account, can we use the same username for a new account? - Quora

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Username, Roblox Wiki

Roblox terminated me for the YT in my username??? : r/ROBLOXBans

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A Roblox exploit is triggering automatic account bans