1. Learners should only read the blogs by native English speakers? Learners want to learn standard English (AmE or BrE). They read and learn, but, if what they read is full of grammar, spelling or expression mistakes, what's the point of reading such blogs? Maybe you don't care who the blogs are by. Maybe you just want to communicate, not only to learn English, then it's fine. Maybe you'd say blogs by native speakers contain a few such mistakes, too. What's your viewpoint?
2. Do native speakers really want to come here and leave some comments for the learners? Imagine, if your mother tongue is Spanish and you see so many learners want to learn Spanish here, do you really want to take the time and respond to any questions? In doing so, what's the benefit you'd get? So, what could be the motivation for a native speaker to come here often? No wonder, learners often value the blogs by native speakers most! What do you think?!
All the possible comments are welcome and would be highly appreciated!