https://www.standard.co.uk/news/crime/bitcoin-high-court-lon...
The norm, as far as I'm aware, is that the losing side is on the hook for the winner's legal fees. Seems like a pretty good deterrent against bringing frivolous claims.
There's a very different business culture in the UK when it comes to legal threats and I suspect the fact the loser pays both sides plays a big part in that. As a business owner, I'm happy to avoid more commonplace legal nonsense, even if it means there's potential for huge companies to abuse it.
(Not a lawyer)
He essentially bragged on his slack that the relative costs didn't matter as his goal was ruining his opponents by causing them costs.
A relevant detail is that even though loser pays in the UK they don't pay 100%, so one can potentially make the residual they do pay ruinous.