If most of the 1000s of shareholders don't even know that a COR lawsuit exists, why would they ask their broker.
Do you think it's true that thousands of CRGP shareholders don't know about the lawsuit? That seems to me unlikely. Most people who play pennies get their information from message boards, the social media, and promoters. CRGP wasn't promoted in the critical period, so that's ruled out. It's not as if investors' brokers recommended the stock, or they read about it in the WSJ.
People don't buy pennies in a vacuum. They may not post, but they do read. The suit's unusual, and has attracted a fair amount of attention, so even if some who received the divvy moved on immediately, they're likely to have heard about it.