You are correct that KGKG is a small company. Thus, they will act like a "Mom and pop" company. I believe they cannot afford to run a national advertising campaign
National advertising campaign could cost millions of dollars. KGKG does not have that kind of money, yet. There are algorithms to determine what the advertising budget should be based upon discretionary income plus other things to consider.
Right now, IMO, they must advertise in local markets or join with other companies and distributors. Their tweets gives investors some assurances they are working. You are, IMO, correct that they cannot do it alone.
Word of mouth will take 100 years for KGKG to get complete advertising coverage. Well, I don't expect to be around 100 years from now.