During our work in the Policy as Code open source project OPAL, we discovered that AdTech is one of the most complex industries to implement fine-grained authorization. In this article, we will be sharing how Reddit developed their own authorization system for Ads using OSS and advanced policy engines.
In the debate between policy as code and policy as graph, Reddit chose a unique approach. They used OPA (code) as a model and a centralized (Zanzibar) service.