well, i guess he gave a talk about quantum computing and bitcoin, you could see that as an ad for that company.
this looks to me like a motte-and-bailey argument.
if he gave a talk, grew suspicious of their plans, quit supporting them, then there is no wrongdoing here, no proof that he ran a scam company.
perhaps because not a single person was dumb enough to fall for it?
How about this- for 4 years people have been talking about this, not once has he simply replied "I never tried to raise money to build a quantum bitcoin miner"