The payments processor facilitated millions of dollars of PlexCoin investments before shuttering accounts in September 2017.
Having only settled with the SEC last year, the PlexCoin founders now face a fresh round of charges from the U.S. Department of Justice.
The SEC is taking seeking further action against the founders of the Plexcoin crypto scheme, alleging they are not complying with court orders.
The SEC is once more taking action against a co-founder of the PlexCoin ICO project, having already sued him over securities violations and fraud.
U.S. and Canadian authorities appear determined to make an example of an ICO believed to have raised $15 million.
A Canadian court ruled against the organizer of an ICO after it was alleged that they repeatedly violated orders to cease soliciting investors.