Thanks again Alex for your help and comprehensive information.
The truth is that I don't class them as "premium", especially the way you describe them but they are still editorials. They are not many around 100, so i may as well leave them only on Alamy and see what happens. I've sold already one for 8.50 something. Well chuffed  .
But at the same time i sold a macro of a bug for the same price.  . It's all still a bit confusing despite the fact that I'm reading the forums every day.

JaenStock thanks a lot. I'll try to improve upon your feedback and everybody else's. Very valuable indeed.👍

Thanks everyone again for the feedback, i had my suspicion about my crap old monitor .Maybe it`s time for me to upgrade.
I`m glad that people critique my portfolio.I appreciate it.

Hi there,
I have around 500 images and just to speak with numbers i`ve made 118 sales so far.Do you think that my images don`t have commercial value or they are not well executed? Or just maybe the stock is very saturated and i shouldn`t expect anything better. For me this is a part time job and i`m trying to increase my portfolio and whatever comes.I love photography and i will keep shooting whatever what but i would like to know if i can improve.

That`s my link: https://www.shutterstock.com/g/dimitris+vlassis?language=en
Thanks in advance!