As discussed in community hubs like the Whirlpool Forums , M3U links can occasionally go down for several reasons:
APSATTv still exists today, but it is a shadow of its former self. The original maintainers have moved to encrypted Telegram channels, private Discord servers, or paid "closed M3U" services requiring cryptocurrency. The golden age of the open APSATTv M3U—the one you could find with a simple Google search—is over.