How betting companies pay tax to Indian gov such as 24KWIN, 24KBET, Lotus etc?

Betting companies operating in India, like 24KWIN, 24KBET, Lotus, and others, adhere to taxation regulations as per the prevailing laws. 

I am wondering how they pay tax, GST, TDS etc, to government of India since most of their servers and companies are outside of India.

Moreover, how they managed to get huge traffic since there are plenty of betting companies in India and all are earning huge like 24KWIN, 24KBET, Lotus etc?