I think that the "pay to post" issue won't be a problem. The Akasha coin will be more valuable than the Steem Dollar, because a lot a people will invest in it. There's a very good team behind this project and in the last weeks Vitalik himself started promoting this project.
I think that you can make a lot more money on Akasha than here, so ... because of this money purpose, a lot of Steemers will become Akashers :D