Blog promotion on Pinterest. Regularity of linking.

I created a Pinterest account, started making pins. I am trying to create 10 new pins every day.
Should I add a link to every pin I did? I guess it is not a good practice, is it?
Then, how many of my pins should contain a link to my blog/an article? What is a good proportion you use/recommend?
Currently, I made and pined about 50 pins. I added a link to my blog in one of them only. What proportion of the pins can contain a link to my blog?
Could you share your experience please? Thank you.