Two faulty assumptions in your equation:
1) The activity (or lack thereof) in this forum is not necessarily a reliable indicator of interest in the stock. There are other stock forums and social media sites that have more activity than I-Hub. Shareholders go to where there is the most conversation and reliable information regarding their investment. Some pot stocks have active forums on I-Hub, others do not. Plus the I-Hub board recently switched the forum from the PUFXF symbol to the AGRA symbol which would affect traffic.
2) Agra is not a grower yet, so claiming it to be "one of the largest growers in the world" is not accurate. Even after the Delta facility is complete, they can't be classified as one of the largest growers in the world. That will only occur when the company provides production results. Until then, Agra is merely a company that is retro-fitting the 2nd largest greenhouse in Canada.