Last summer's blockbuster was Helios and Matheson Analytics' (NASDAQ: HMNY) majority-owned MoviePass. But this year, the hot multiplex subscription plan has to be AMC Entertainment's (NYSE: AMC) fast-growing AMC Stubs A-List service. AMC announced after Thursday's market close that its monthly movie subscription service has topped 260,000 paid subscribers. Those members have now seen a million movies under the plan, and that's not a bad haul for a service that was launched just seven weeks ago.AMC Stubs A-List rolled out in late June, and AMC announced in its second-quarter earnings call that it had 175,000 moviegoers on the platform by the end of July.