Are you allowing current CTR exempt customers to remain exempt if they sell the CBD products you see at most grocery/convenience/tobacco stores? (From hemp, less than .3% THC etc..)

First - polls no longer work in the threads.

Second, if they not are doing anything illegal, why would you not?

If it is hemp based, run of the mill CBD, yes. Hemp is legal, as you've defined it in your question, at the Federal level, so if it's a grocery/convenience store that just happens to have CBD on their shelves, which represents a small portion of their revenue there's really not much to worry about. Treat them as you would any other grocery/convenience store.

If on the other hand, the CBD is marijuana derived, sold by a licensed CRB, then they cannot be exempt.

From FinCEN: "A business engaged in marijuana-related activity may not be treated as a non-listed business under 31 C.F.R. § 1020.315(e)(8), and therefore, is not eligible for consideration for an exemption with respect to a bank’s CTR obligations under 31 C.F.R. § 1020.315(b)(6)."