I am asking this because recently in one of my hosting account which was multi domain hosting. I have 2 blog like one blog where I used to post generic topcis like, love tips, fitness tips, bodybuilding tips and many other it was a multi topic blog.
Then in the same account i started a separate blog in bodybuilding niche where i used to share only post on bodybuilding topics. i did this with the add on domain.
I know this is advanced seo that in the same hositing account if you host similar sites which post same or similar content (not duplicate) then post from either of the 2 blog will get ranked and the same happend to me.
From my bodybuilding blog all post started to rank above my multi topic blog and I saw that because of this my multitopic blog got hit and the traffic went down.
I have read in search engine that that john muller confirmed that hosting similar sites on same hosting account may cause problem.
And above that my adsense earning from my bodybuilding started to decline to the point where it was showing clicks but no earnings.
Because google knows that the blog owner is trying to make multiple blogs on same niche and make money with adsense. And I think that this is the reason why my adsense earning on my bodybuilding blog declined becuase I was having blog post on same topic on both my blogs.
Outside reader cannot see that it is a separate domain but the addon domain gets setup as a subdomain of the primary domain and inside the file manger addon domoin is added in subfolder.
I think that google is able to identify that this is the addon domain and this is the reason i think my traffic of main sites for same post got decline and also the adsense earning on my bodybuilding blog.
So please any one which know this topic please share your thoughts. I think that google is able to identify with the publisher id which I am using on both the blogs.
So when this happened after doing lot of deep research on this issue I moved my other bodybuilding blog to other hosting account and the problem solved. All the post of my main blog which were in bodybuilding topics again regained their ranking.
So what I learned form this is never host similir sites on one hosting account. this is 100% sure becuase addon domain is nothing but the subdomain.
Now I am thinking to host my bodybuilding blog on other hosting account. Now I am not using adsense ad on it and I and confused that to use the adsense from the same account or create another adsense account to monetize my similar sites.
Please guys anybody give their valuable advice and suggesstions.