Hi Vinxi --- Welcome to Blogit
This is a weird and wunnerful place. One day it is nothing more than a glorified chat room, the next day an invaluable tool for gaining feedback and helpful insight on your latest work in progress. In the year ( almost ) that I have been here I have run the entire gammut of this site's uses, distractions. pitfalls and wonderments. Where there are no real hard and fast rules as to what is suitable posting material there are some real and common sense guidelines. Adult content for example should be posted in the MA section and will be moved there if it is deemed to belong there ( fair enough ). All other categories are used at the author's discretion. It only makes sense however if you are writing an article about repairing cars for example that posting it in the Religion and Spirituality category may miss the intended audience.
The commenting aspect can be very important to gain readership. A means of letting people know you are here. Catchy or provocative headlines help as well. Ultimately you will find that the quality of your work is not the sole determining factor in gaining readership. ( it never is ) Some promotional efforts must be made to attract attention to yourself. Having said all of this Blogit can be a very useful tool. There is an eclectic mix of people here with a great variety of writing experience. From the rank amateur to published professionals. Much can be learned and much can be taught.
In the end it is up to the individual to derive as much as they can for their $6 membership from here. Blogit simply is what we as members choose to make it. Good luck with your writing endeavours.