Up to this point of investigation, how many people are confirmed to have taken part in the collusion?

I cant say. I know by name 5-6 of them. But im sure theres more. Some arent named because they implicated others or given proof to what Verbal was doing. Theyve been all blacklisted as far i know.

How much is kickbacked is known

Couple hundred maybe. Some stuff onchain, some offchain. Not easy to track.

Will there be a lessons learnt and how we can do better with the utilisation of Value Plan funds in future

This was a great way to utilize the funds, numbers speak for themselves. Others can emulate it, but in terms of my personal oppinion of how I think VP funds should be used... well you can guess what I think about supporting content creators in this manner ever again.

How can the community prevent ourselves from unknowingly supporting these users who abused on Hive, or worst still to have them on our personal Hive projects. If there's an abuser on my project I'd like to know and to make my own decision on their worthiness.

I think thats what the blacklist is for. But a good question.

Finally, out of the 1500 users Vibes onboarded, you mentioned hundreds are still active. Do you have a list so we don't have to scroll through the Vibes community. If they are legit new users, I'm sure the community would like to support them. A txt file will be good.

I dont know how I would give you that list. The active users were visible on the community page. Ofc, most arent active now in Vibes community as i shut it down but you could scroll the community page and see who they are.