Earlier quoted context omitted.
I vaped it. It all evaporated every time. And I've tried multiple vendors, I know how the powder looks like, are you suggesting there's a cutting agent or what? Why would a reputable company do that? It's not a very reasonable position. I'm sure there are fakes out there, but not very many, I would estimate.
You estimate wrong, then. Typical preparations, most especially those sold for vaping, turn out on examination to have ~2% of the amount of CBD advertised, where they have any. I.e., they have just enough that a crude test of presence shows something present.
Actually, here's what I see on a typical vaping prep, for THC but not CBD:
TOT THC: 80.94%. Tot THC: 809.42mg. Tot CBD: 0.00mg. The CBD ones typically have between 65% and 99% CBD. Each container has a traceability mark and these things are tested in-house with calibrated equipment.
That said, I buy from a premium dispensary and I have no idea what's vended in smoke shops.