The investors were promised 1000% revenue in under a month, the team wasn't listed due to fears of them being poached by other companies, as was stated on their ICO page, and even the founder decided to stay anonymous. All of this contributed to SEC getting a closer look at the company.
The result of investigation being ICO closure and charges being pressed against PlexCorp founder Dominic Lacroix. All the anonymity byplay was for a good reason, it seems. Lacroix is quite famous, or infamous, in Canada for multiple violations of securities law. And his recent project, it seems, doesn't benefit anyone, except himself and his partner-in-crime Sabrina Paradis-Royer. Their ICO yield was above $15 million, but the investigation uncovered, that the funds went to their pockets and were spent on home decorations and personal expenses.
The commentary from the SEC states that this case checks all the points of being a full-fledged cyber scam and is exactly the type of fraud the unit is designed to prevent.