There's no such thing as a legit "Dank Vapes" cartridge. The "brand" only exists as packaging for black-market cartridges. You can buy the cartridges and "branded" boxes by the hundreds on AliExpress.
THIS appears to be the problem, or a sizable portion of it anyway. The media sensationalizes, the officials implement draconian bans, and none of it addresses the actual issues it's intended to combat.