I’m not terribly familiar myself, but if I know correctly, they have a term called lakh, meaning one hundred thousand, like a dozen means twelve in English.

They use it extensively, so Indian English is not primarily using thousand and million, but thousand and lakh, so if they saw 150k, their instinct is to look at it as 1.5 lakh, hence the separation.

So it’s how they write 150,000.