Michael Kail worked for Netflix as VP of IT ops.
Netskope wanted Netflix to be a customer.
Netflix (or, more specifically, whoever they talked to at Netflix) said "Sure, we will buy your product, but you have to pay Michael Kail."
Nine other companies were told the same thing by Netflix.
The question here is whether Netflix paid Netskope because that was genuinely the right thing for Netflix, or whether Netflix paid Netskope because Michael Kail, who had the authority to make purchases using Netflix's money, personally benefited from the deal. It's a conflict of interest.
Maybe a simpler example, and possibly easier to understand: Suppose Michael Kail, in the evenings after he got home from Netflix, started a company called Kailcorp that provided IT services. Then when he got back to the office, he said, "We should sign a deal with Kailcorp and pay them lots of money." Is it clear why this would be illegal / why he would be profiting at Netflix's expense? (Genuine question - maybe it's not.)
If so, then the only distinction here is that Kail didn't start the company himself, he subverted ten other companies (with real products) into the same thing.