Criminals are trying to glean login details to harvest players’ in-game currency and personal data Your 10-year-old son has started playing Roblox, when he realises all of his in-game currency, Robux, is gone. When you try to find out what happened, he says he was recently promised extra Robux if he followed a link on YouTube. When he signed on at the site link, he was taken to the Roblox site as usual but there was no sign of the extra currency.