There will be incentives in the future, both in terms of promoting a good seeding/leeching ratio like bittorrent ("bitswap"), as well as http://filecoin.io/
And how would you deal with materials that could get you either dead or imprisioned? Can you elect not to host content? For example, in china, you have a situation where you can be materially affected by political content.
https://www.privateinternetaccess.com/blog/2015/10/in-china-... Or what if you happen to live in a country hostile to LGBT content, like russia or Zimbabwe, where it may be dangerous to host such content?