The article keeps framing it as "The metaverse division" and "sink billions of dollars a quarter into developing the metaverse"... but Reality Labs (basically Oculus) doesn't just do stupid metaverse/horizon-blah, they make the actual Quest. So I expect a decent chunk of this was the cost of developing their two recent hardware upgrades. I believe they may be back to selling at or below cost again, so part of that loss could also be a strategic loss for future market share.
If more of it actually went into the metaverse nonsense then that's truly abominable, but the article presents no evidence for this. It seems like all of the media still doesn't realise the Quest is primarily a gaming platform and horizon is just a stupid side project Zuckerberg has forced upon them, to everyone who actually uses them this framing just seems ridiculous.
-- EDIT --
Thank you tomxor for entertaining a possible answer.
Does anyone really know how these tax write-offs work? People just use the term without any clear understanding.
Meta like any sane company out there will probably use every rule to avoid (not evade) paying tax. Thats good for the shareholders. But this isn't one such measure, it's mostly R&D expenditure.