Spy tool (ad intelligence)

Spy tools crawl ad placements across native widgets, social feeds or push networks and store what they find in a searchable library: the ad, where it appeared, roughly how long it ran, and the page it led to. Commercial products such as AdPlexity and Anstrex serve this market, and the big platforms publish their own free transparency libraries of active ads.

Arbitrage media buyers use them for research. An ad that has run for months is probably profitable for someone, which hints at which verticals, keywords and angles are working, and in which countries. Following the click through shows the competitor's lander and which feed it uses.

The limits are important. A spy tool shows what ran, not whether it was compliant or profitable. Plenty of long-running ads break feed or platform rules and simply have not been caught yet, and copying one imports its risk. Lifting someone's images or text can also infringe copyright or the trademark policy. Treat the tool as a map of the market, not a source of ready-made ads.

Think of it like this

It is walking down the high street noting which shop windows have had the same display for six months. Useful, but you still cannot see their accounts.