Traffic source control to block search engine referrals

Allow program owners to exclude or ignore affiliate traffic coming from major search engines such as Google, Bing, Baidu, and Yandex. This helps reduce fraud and prevents affiliates from claiming commissions on branded search traffic or paid ads that should not be commissionable.

Why this is useful
Some affiliates try to game programs by running search ads or ranking for brand keywords and then claiming referrals that would have converted anyway. Being able to ignore traffic from major search engines gives program owners more control and helps ensure commissions are paid only for genuine affiliate-driven referrals.

Proposed behavior
When enabled, referrals where the original traffic source is a major search engine would be ignored and not attributed to affiliates. This would apply to both organic search and search ads.