If I had to reply to my own question I would answer that perhaps this happened simply because of the huge number of bloggers around which for a big part are not

If I had to reply to my own question I would answer that perhaps this happened simply because of the huge number of bloggers around which for a big part are not that much tech savvy, making them more exposed to the appeal of a "better, easier than wordpress" blogging platform. I think that such big revenue came exactly from the stress devs put on the "simplicity feature". But I have this kind of feeling that I would like to be shown the part of the picture I am ignoring so to be proven wrong (which hasn't happened so far...).