Why do your research when you can get free PR by willful ignorance
Hidden in the tax watch 'research' are these weasel words...
'...and unnamed qualifying Rockstar employees...'
So it's not a 'how do we get the money out' scheme, it's an employee reward scheme. Rather common in industries where revenue can swing wildly.
'It is not known whether and how much UK income tax has been paid by the principals on these profit shares'
Except of course it wasn't just the principals. It was normal employees paying UK income tax on their bonuses. As income tax is higher than corporation tax there's a fair chance the UK arm of Rockstar was responsible for more tax payments than if it had retained profits and paid corporation tax.
Still, when your future as a think tank is governed by how many column inches of outrage you can generate then actual facts are just collateral damage.