Investigate possibilities to incentivise owning topic and publishing.

[areknoster]

Currently, whereas there are clear benefits of using PDCL as a consumer, we the incentives for owning a topic and publishing messages seem somewhat limited. The goal of this issue is to discuss the ways to change it.

Ideas:

• https://docs.aws.amazon.com/AmazonS3/latest/userguide/RequesterPaysBuckets.html or similar to offset storage cost
• https://docs.filecoin.io/
• Worth reading: https://arxiv.org/pdf/2009.11033.pdf