Well ... there's a couple of ways to look at this.
If people ARE buying this on the Grey Market, if the stock will never trade again, then they are as hosed as we are, and VERY stupid. But, if people (investors) are buying this on the Grey Market, then they must think good things are ahead.
I don't know if people are trading this, but was only commenting that it's possible. However, usually Grey Market buying is common (or not unheard of) BEFORE a company goes public, with backers acquiring a stake beforehand.
Revoked stocks are usually dead for good, but it's obvious that this company isn't dead. It has operating restaurants, active social-media advertising, AND an expert securities/going-public lawyer as its agent. So it's not unimaginable that Grey Market trading could be happening. But again, this is only a guess. Maybe there isn't any.
BUT, the fact that the stock showed an unsolicited bid for almost a month suggests something is/was happening behind the scenes. If it came from a market-maker, then the market-maker had to follow the rules about inspecting the financials.