Membership to the theatergoing subscription service MoviePass surged after it dropped its prices this month, with more than 150,000 new users signing up in just two days. Its members can now go to the movies 365 times a year for $9.95 a month, and so far they have been going in droves, according to data released by one of the company’s investors.

But not everyone is happy: AMC Theaters, the country’s largest cinema chain, has said that it is looking for ways to block subscribers from using the MoviePass app to buy tickets to its theaters.

In a statement this month, the theater chain derided MoviePass as “a small fringe player” and said the service was “not welcome here.” AMC said lawyers were reviewing its options for barring subscribers from using MoviePass at its facilities.

MoviePass, which was founded in 2011, announced on Aug. 15 that it would lower the cost of its unlimited monthly subscription from as much as $50 in the most expensive cities to a flat nationwide rate of $9.95. The deal works at 91 percent of movie theaters in the United States, the company said in a statement, but it does not apply to 3D or IMAX movies. Members can see one movie a day.