I occasionally use CBN for sleep, never THC, so maybe it's different, but I quickly develop a tolerance, like within a week of daily use and have to cease for many days or a few weeks to get any further benefit at all.
As I read, the endocannabinoid system in the brain is pretty homeostasic.
Does something similar happen with cannabis munchies subsiding to people who ingest THC or whole leaf products daily?