this is pretty much standard operating procedure for plaintiff's class action firms. if you look at companies that have announced restatements or significant adverse events that cause a stock price to plummet (especially exchange-listed stocks), you will see all sorts of firms running these quasi-advertisements. don't see it too much with pennies because there's not enough money involved to make a meal out of a lawsuit, but maybe they think PHOT and its officers and directors have some resources that can be tapped or insurance that might cover claims.
Sad part is Im sure a ton of people on the inside made out like bandits by having friends buy a ton of shares at low prices...in the end worst case scenario 1 or 2 people go to jail for 5-10 years..and are rich when they get out...the people who really suffer are not corporate thugs..