There are more than 500m SVoD subscriptions globally

"Gross SVoD subscriptions increased by 139 million in 2018 to 508 million – or up by 38 per cent, according to the SVOD Databook from Digital TV Research. The net subscriber count rose by 83 million in 2018 to reach 357 million – up by 31 per cent. This means that the average SVoD subscriber paid for 1.43 SVoD subscriptions by end-2018 – up from 1.05 in 2010.
“China and the US together accounted for 63 per cent of the global total in 2018,” advises Simon Murray, Principal Analyst at Digital TV Research. “China overtook the US in 2018 to become the gross SVoD subscription leader. China added nearly 60 million subscriptions in 2018 alone, with the US up by 27 million (despite its relative maturity). India nearly doubled its subscription base.”"
Source:  Advanced Television, 18th September 2019