As part of their ruling the High Court would have had a thorough examination of Betfair's books to establish where & how they generate profits, & the ruling would seem to suggest that the imposition of a turnover tax would/should not render their business unprofitable & that with some tweaking, they could continue on as before.

That said I wonder if their review also looked at the issue of the impact on Betfair clients, profitable or not? I would assume one couldn't be done without the other, as clients leaving in droves tends to be bad for business

Perhaps we might be jumping the gun on this one.