I obviously don't know the details, but knowing the number of actual users on Twitter is probably the most important factor to base an offer on? He's not exactly new on Twitter, so if Twitter claims 5% bots he just accepts that? I find that extremely unlikely, unless he had another motive.

>How do you know what due diligence was done and what new information might have come up?

Based on the "Funding secured" or "Pedo guy" nonsense revealed in court documents, I have a pretty good idea how much due diligence was done prior to the offer: zero.