On October 26th, CoinDesk reported that the creditors of cryptocurrency trading platform CoinFLEX have sued CoinFLEX CEO Mark Lamb, accusing him of violating his fiduciary duties at CoinFLEX when launching OPNX, which later changed its name to OPNX. In documents submitted to the Hong Kong civil court on October 12th by CoinFLEX creditors, OPNX was referred to as a "competitive enterprise" of CoinFLEX. OPNX was not authorized by CoinFLEX's board of directors or creditors, and Mark Lamb misappropriated the company's intellectual property, technology, customer base, and employees to establish the trading platform.

On October 12th, a copy of the summons was delivered to its Hong Kong office, and the summons also accused Mark Lamb of unauthorized actions in reaching a settlement agreement with Roger Ver.