Hi Raghav,
Also I did not find anywhere what is a valid post or blog and what is not. Right now I think this is purely on moderators discretion. Getting this guideline set up is also a challenging task.
RoE talks about removal of content but does not specify what is the criteria being used.
I'm happy someone identified this & said that. You know what, I'm rather confused (not an issue of happiness) about the rejection.
In both the cases, I asked this question but nobody responded ever. Instead I was suggested to use conscience, self discretion etc etc. Well the day I get to know about correct blog content & correct space, I'll blog again. Till then, I don't need to and shouldn't as well.
Good to see you here 
ntn