Blogging apps on Steem, Voice on EOS and Facebook are very different kinds of animals. Steemit et al. and Voice are tiny compared to the likes of Facebook. Steem and EOS can host a large variety of different kinds of apps for very different use cases. Facebook has many use cases, too, but for most people it is for maintaining connection with friends and acquaintances. You can advertise and promote and Facebook also has a market place. It has groups. But it's not easy to publish anything to the world on Facebook. Nor is it very useful for blogging. Facebook is hardly a gaming platform, either, like Steem and EOS already are.

I may start using Voice but for one purpose only: shilling Steem. :)