Worldwide it's less then 1/4, but for obvious reasons, its market share is much higher in wealthier countries. From a brief search, it's 46% in the US, and has

Worldwide it's less then 1/4, but for obvious reasons, its market share is much higher in wealthier countries. From a brief search, it's 46% in the US, and has the majority in a handful of European countries including the UK and Norway. So regulators in those countries still have a reason to look at it.