5. Buy Email Databases From Other Semi-Niche Businesses and Send Them Emails
Buying a CBD business database from another CBD business is a dishonest and unethical practice, however, buying it from a semi-niche business can't be considered something illegal. You may even exchange your databases with another company, which, for example, sell wellness or skincare products with herbal components in the compound. Most likely, the newly created business from the semi-niche will gladly agree to the opportunity to boost their database as well.
After you get it, return to the first point and carefully start the conversation. Don't forget that the users whose contacts you have got, may not know about CBD or have some prejudices about it.
Thus, you should come up with several cold emails and test the results. Pay special attention to the headline. Since headlines are quite important for the user's motivation to open the letter, you are better to come up with several cold email headlines but don't' change the main content of the letter, test them, and proceed with the best option that works for the audience you have bought.
As for the cold headlines creation, try to create intrigue, for example, hint in sharing some kind of a secret, or use Fear of Missing Out tactics. For the latter case, make sure you are not using the words from Google's blacklist
since this is the direct way to the spam folder.