Client Brokerage - Soft Dollar Standard

I’m confused with the below statement. It means that I get client B to pay for Client A brokerage fee and client B still get to use the soft dollar to buy research and stuff?

Or does it mean that I get to use Client B Soft Dollar to purchase services that will benefit Client A?

“The IM must not use Brokerage from Client A account to pay for a product or service purchased under the Client-Directed Brokerage Arrangement.”