Gridcast

Mid-market media companies coordinate newsletters, podcasts, and channels across internal portfolios and external partners, but reciprocal promotion is often managed through messages, calendars, screenshots, and informal promises. The supplied research confirms a low-cost individual-creator reciprocal-sharing product and a paid audience-research category, while finding no portfolio-level B2B promotion ledger. It also confirms a publication-data API but says the proposed audience-research API is not available and current plans prohibit programmatic queries. Gridcast therefore starts with authorized first-party aggregates and documented manual imports, never prohibited automation. It records audience definitions, measurement windows, overlap method, uncertainty, placement inventory, give-to-receive terms, approvals, scheduled placements, delivery evidence, adjustments, disputes, and settlement. Audience overlap is an estimate under a declared method, not a person-level identity graph. A scheduled promotion is not delivered reach; delivered reach is not engagement; engagement is not conversion or revenue. No promotion executes without each publisher's approval and platform rights. The ledger can show an agreed balance, but it is not a financial settlement system and cannot make partners owe reach beyond their contract.

The audience-development, partnerships, growth, or portfolio operations lead at a media company with multiple publications, podcasts, or channels and recurring cross-promotion partners.