What's happening around the world is irrelevant.
MJNA is not set up right now to make money on the sale of THC-inclusive products, and won't be until marijuana becomes legal on a U.S. Federal level.
Therefore, the only sales they can make money from are for sales of CBD products, and it will take a lot of investment to grow those markets.
MJNA doesn't make enough money from product sales to fund those investments, so they sell stock, which dilutes the value of the current shares.