Marketed all-ages; huge under-13 base
A vast platform of user-made games with in-game chat, an economy (Robux), and an enormous under-13 audience. The openness that makes it creative also makes it a contact and scam surface.
Strangers befriend kids inside Roblox, then push them to less-moderated apps where filters don't apply.
Bad actors repeatedly re-upload sexually explicit Roblox games and share private links before takedown.
Sites promising free Robux phish a child's login or bury them in endless 'verification' surveys.
Scammers in trading games promise to 'go first', then take a child's rare items and vanish.