Any source on this? I heard carriers let them through because their spam call filtering service was a cash cow (i.e. they didn't have to let them through, othe

Any source on this? I heard carriers let them through because their spam call filtering service was a cash cow (i.e. they didn't have to let them through, otherwise no anti spam service could exist from them, they maybe did have to by default, but could have offered the service free with opt-in and advertised it). https://www.fcc.gov/consumers/guides/stop-unwanted-robocalls-and-texts https://www.fcc.gov/consumers/guides/stop-unwanted-robocalls...