RE:Why the dropped of all ?Might have been this, DEA places some on schedule I:
https://www.greenmarketreport.com/dea-places-six-cannabinoids-in-temporary-schedule-1/
These products typically come from China in bulk powder form and are smuggled via common carrier into the United States and find their way to clandestine designer drug product manufacturing operations located in residential neighborhoods, garages, warehouses, and other similar destinations throughout the country. The producers then spray or mix the SCs with plant material for consumers to smoke with a pipe or rolled into a joint.