“36% cut of safari deal”

is very different to

“Google pays 36 percent of its search advertising revenue from Safari to keep its search engine set as the default in Apple’s browser”

The former implies some sort of fixed cost arrangement.

The latter implies a revenue share based on traffic and volume of advertising. It could even include all search revenue for ads displayed in Safari via Google owned ad networks - even if the ad placement did not originate from a google search.