# 6.1 Marketplace features, discounts and rewards

The **YappaFi** tokens will be built on the Polygon Blockchain (see the next chapter for details) and aim to become interoperable with bridges across major blockchain networks Polkadot, Stratis, Cardano and XRP and other blockchains. In keeping with the decentralized objective, later iterations of the YappaVerse will also allow users to choose which decentralized file storage system their rich and highly personalised data will be stored on, creating an additional value proposition for users. Initially user data will be stored in Polygon Nodes attached to each user's KYC and [Polygon ID](https://polygon.technology/polygon-id/).

YAPp Points are designed for engagement. The data stack allows YappaFi software to gain insight into tone, pitch, sentiment, motivation, intensity & brand detection. This data stack allows for a uniquely rich set of metrics that we believe will shape the future of engagement on the platform.

In-house machine learning will match ultra-relevant ads to engaged users and those who opt in are rewarded with $YAPp POINTS, receiving the highest possible relevance of ads causing an unrivaled CTR (Click Through Rate) and transaction rate. Users who opt-in to be validators on the YappaFi network will also gain access to their individual data stack.

Creating true ownership of personalized data in a decentralized manner is our key vision. Instead of users being unaware, they can now become highly aware, and eventually have the ability to prevent advertisers or publishers from using certain parts of their personal data stack as they have ownership and responsibility for their personal data.

For highly engaged content a portion of YAPp(POINTS) & **$YPA (YappaFi)** will be rewarded to publishers encouraging publishers to promote positive content.
