Not sure if you asking for advice, so feel free to ignore.
IMO, it feels like you are trying to hard to compete on features. For me, a better approach (ie, one that would pull me away from the other services) would be to focus on usability and simplicity.
Examples:
Uploads - Why not just one screen? (note: Upload Text definitely tripped me up since my first though was "I have to upload a file")
Tags/Future post dates - not features folks really need (IMO of course :)
After Posting - I would expect to see my content right away. Instead I have to click around to find it
Viewing my Sprred - Not sure why there is a home and blog tab. Feels like there should be a single tab
Name - I will never be able to say check me out on Sprred out loud without spelling it.
Apologies if this this overly negative. It is generally easier to pick out things you don't like.