Does Google treats all platforms like each others ? I observed that Google give much more better results in SERPs for paid domains than free blogs, even the free one has more valuable content and high quality backlinks. What do you think ?
Its does not matter at all. There is no such thing as "domain authority" when it comes to adsense approval. The reason that so many "free blogs" that get rejected from Adsense and why so many do not rank well in the search engines, is that there are just more crap useless sites on the free platforms. If you have the UNIQUE and COMPELLING content that adsense wants, then you will get approved, regardless of the platform
Just pick any platforms outside there that suit your needs. Buy a domain and you're good to go. Sometimes .blogspot.com can do well. Example, type in this keyword on google.com " printable coupons ". See the 1st result??
Its nothing like that both have same priority in the eyes of google. When it comes to SERP ranking there are numerous factors.
Blogspot also can perform well even with low seo, because lately I frequently saw blogspot on 1st page it even beat my wordpress site. I think Google don't care about meta tags anymore haa
Care to explain what this has to do with the topic of this thread? Did you not see the "Adsense" in the question?
Ts asking about using website with paid domain or free google blogspot for adsense, what I mean is it doesn't matter what platform you are, even a free blogspot blog can rank high with a unique quality content.
I have used both and got the same results every time. Google doesn't care what your site is, it's not about how many people see it on the long run, it's about how many people actually click the ads and follow through.