Cross-Chain Interaction With Parachains

One of the most exciting aspects of Polkadot is the ability for one parachain to trustlessly interact with another. This also means it should be possible to use any token on Polkadot or Kusama to make payments on Subsocial. The primary interest for this is likely to be paying for subscriptions in either DOT, KSM, or any of the various stablecoins. Additionally, it would allow integration of functionality from other parachains, such as decentralized identifier solutions from KILT, or prediction markets from Zeitgeist.