Find LinkedIn spend that produced nothing

Finds campaigns (ad sets in Campaign Manager) spending without result: impressions with no clicks, clicks with no leads or conversions, and cost per lead well above the account average or a ceiling you give. Use when: the user asks where money is going, before a budget review, or when spend rose without results. Run it on last_30_days — a shorter window on LinkedIn's volumes produces confident nonsense. Do not act on its findings without checking tracking first: "clicks but no leads" is a conversion-rule problem as often as a creative one, and pausing a campaign whose leads simply are not being recorded destroys a working campaign. The tool says so in every such finding. Do not present the recoverable figure as guaranteed savings — it is what would stop being spent, not profit. Returns a ranked list of findings with the spend behind each and a specific next step. Campaigns below the minimum spend are excluded rather than judged on noise. If nothing is found, say the account is clean for this window instead of manufacturing a recommendation.