What Prompted Poloniex to Abruptly Shutdown Crypto Margin Trading?

Poloniex, one of the oldest cryptocurrency exchanges in the market, has recently initiated the process of shutting down its crypto margin and lending products for US-based users.
In an official announcement released on October 4, the Poloniex team stated:
“By the end of the year, we’re taking steps to remove our margin and lending products for US-based customers. These changes are part of our ongoing commitment to ensure that Poloniex complies with regulatory requirements in every ju