It feels like MySpace completely collapsed within a very short time-frame of it being bought by News Corp. Nobody associates it with them, we all associate it with Tom. I guess this article was written just before the collapse, and it probably really felt to The Guardian that MySpace was a really powerful asset in Murdoch's hands forever.
So even in early 2007, there was no hard signs of trouble at MySpace.
It appears to still be around, but is it still used in a wider part of the population (in South Korea)? Couldn't find any user numbers, English Wikipedia is still in the present tense, though.
Edit: Ah, no, it's apparently dead since 2019, but someone tried to use the brand for some NFT and "Metaverse" thing.
These monopolies seem to be ever lasting but luckily they're not.