Hulu plans to begin a major marketing push for its $40-a-month streaming cable competitor Hulu Live, a senior Hulu executive said in an interview, as it brings the service out of a test phase. But exclusive new data on subscriber numbers for streaming services suggests Hulu may struggle to sign up many people.

Comparable “skinny bundle” streaming services such as Dish Network’s Sling, YouTube TV and AT&T’s DirecTV Now have signed up only around 3.4 million total subscribers between them, according to industry executives with knowledge of the numbers. Sling, the oldest service, has around two million, while Sony’s Playstation Vue service has 450,000 and YouTube TV has 200,000, the executives said. AT&T has disclosed that DirecTV Now had 491,000 as of June 30.