Because management said December's numbers are expected to be 80% larger than what Roblox saw in October and November, analysts are reading that to mean they will be coming down in the near term.

Roblox Expects Approximately $1.5 Billion of Revenue, $2.1 Billion in Non-GAAP Bookings For Year Ending December 31, 2021 Roblox Supplemental Financial Information.