Raising Brows
Dear Raising Brows: These "dispensaries" are quasi-legal at best, and criminal at worst. Based on the stories I'm hearing from states with no legal cannabis, however, this tactic doesn't surprise me. A lot of ballsy operators have popped up in the South since hemp's federal legalization, and this THCA movement might be the boldest of them all.
THCA is just a form of THC that needs to be activated by heat. Cannabis buds typically have more THCA than THC, which is ready to intoxicate. Flames or vaporizers convert that THCA into THC while you burn it (that's why herb should be heated up before you use it to make homemade edibles). Some stores claim they're selling hemp with THCA, not THC, making it federally compliant with hemp laws. That's a bunch of horseshit, though, and good luck explaining it to a cop or prosecutor.

THCA is just THC that requires heat to be activated.
Flickr/WPD
I don't have enough info to tell if the THCA weed in question is the same kind of cannabis we have in Colorado or if it's CBD buds sprayed with THC extracted from hemp. Either way, your friend should stick to an underground dealer and stay away from these stores. The prices and quality alone should be reasons to avoid them.
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