What is a CRM2 fee?

Can you explain to me in simple terms what a CRM2 fee is? I've heard it mentioned in relation to investing in cryptocurrency and financial products, but I'm not entirely clear on its significance or purpose. Is it a type of commission or fee charged by a broker or financial advisor? And if so, how does it differ from other types of fees that might be associated with investing? I'm interested in understanding the implications of this fee on my investments and whether it's something I should be aware of when making financial decisions.