Primary

• Roblox Investor Relations — quarterly earnings and 10-K filings (SEC).
• Meta 10-K and 10-Q filings (SEC) — Reality Labs cumulative and annual operating losses.
• Epic Games newsroom — Fortnite player figures (announcements, State of Unreal).
• Mojang Studios / Microsoft — Minecraft sales totals.
• GlobeNewswire press release — Decentraland Epic Games Store and Google Play launch (31 March 2026).

Secondary (synthesised)

• Wikipedia — used as a synthesised tracker for fast-moving platform updates (Roblox, VRChat, Fortnite, Minecraft, Reality Labs, Apple Vision Pro, Decentraland, Horizon Worlds, Rec Room). Every claim has its own footnote chain; we follow back where possible.
• Wall Street Journal — Meta Horizon Worlds MAU under target (October 2022 reporting).
• TheNextWeb — Decentraland 2026 launch and 847K monthly web visitor figure.
• DappRadar — historical Decentraland and Sandbox engagement (methodology limitations noted).
• Steam Charts / SteamDB — VRChat concurrent users (PC only; standalone Quest users not counted).

Vendor self-report (labelled in entries)

• Spatial registered user counts.
• Zepeto registered user counts (Naver Z).
• Cluster monthly active users.
• The Sandbox registered totals.

We separate these because vendor self-reports often count registered accounts, not active users.

What we don't accept as a source

• Crypto-promotional blogs and aggregator sites without first-source attribution.
• "Top 10 metaverse platforms 2026" listicles that don't cite a date or a measurement method.
• Vendor pitch decks (used for direction only, never for verified counts).

Corrections

If you can show a primary source that contradicts something on this site, we'll publish the correction and credit you. The masthead date and the per-entry "Last verified" stamp update at the same time.