Regulators allege the scheme took over US$300 million from investors
Exec is the fourth high-ranking official at the company or its affiliates to plead guilty to criminal charges
Regulators' year in review also detailed crypto oversight, CFR sweep
Long-running venture took in millions from investors, police allege
Firm failed to reveal conflicted fee payments, regulator charged
Former firm provided reps with improper incentives, regulator alleged
Whistleblower first reported suspected misconduct internally, regulator said
Back-office snafu meant clients didn't get discounts on standard fees
Company allegedly facilitated in washing over US$1 billion in criminal proceeds
Former OpenSea product manager sanctioned for scheme