The players

Search-feed platform named by trackers and trade guides as an RSOC provider; publishes little about itself.

Ad-tech marketplace that supplies search and native ads to mobile publishers, phone makers and telecom operators.

Perion's search-monetisation unit, which supplied Bing ads to publishers, apps and extensions.

US traffic-monetisation platform whose Crossroads portal gives media buyers access to search feeds.

Private ad company offering search feeds and tools that turn display and native traffic into search clicks.

The source of most search-ad money, and the rule-maker whose policy changes can remake search arbitrage overnight.

Dot-com era metasearch company (Dogpile, WebCrawler) whose search business System1 bought for $45 million in 2016.

Small listed US ad-tech firm that earns mostly from Yahoo and Google ads shown on its own and partner sites.

Contextual ad network built on Yahoo and Bing search demand, sold to a Chinese consortium for $900 million in 2016.

Microsoft's search-ad business: the second big source of feed ads, and the engine behind Yahoo's search results.

The company that invented pay-per-click search ads and the syndicated search feed; bought by Yahoo in 2003.

Israeli ad-tech group whose search business, CodeFuel, was built on Microsoft Bing until the 2024 changes.

Israeli company whose content sites and search-feed pages are a common sight in social-to-search advertising.

The largest domain marketplace and a major parking and search-feed platform, put up for sale by IONOS in 2025.

The best-known listed search arbitrage company: buys traffic itself and runs a partner network on Google ads.

London-listed owner of Tonic, ParkingCrew, Zeropark and Voluum, rebuilding after Google ended ads on parked domains.

Team Internet's platform that lets media buyers turn paid native and social traffic into search-feed revenue.

The third feed: an old search brand whose syndicated ads have become the fallback as Google tightens its rules.