Pooling resources, widely practiced in the online marketing sector, involves collaborating on marketing campaigns between several websites or advertisers. This can take the form of a joint contest or a shared email address collection across different sites. The possibilities offered by the internet greatly facilitate the implementation of these pooling mechanisms, thanks to the ease of integrating HTML code that allows, for example, the centralization of the results of a shared collection. Depending on the context, this approach allows for the distribution of costs or the amplification of the results obtained. A good example is the creation of numerous opt-in email address databases, resulting from pooled collections.