"Can anyone explain what happens to us shareholders with an incident like this"
Yep.
Your shareholding is now essentially valueless, unless somebody believes the nonsense pumped out by CRGP's IRPs elsewhere on social media and will buy your shares on the grey market (it's explained here: https://en.wikipedia.org/wiki/Greater_fool_theory).
E-Trade will now almost certainly reclaim any didvidends paid, and I expect other brokers to do the same over the next few days.
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