Hi everybody!
I have probably stupid question. Can I put link to my symbiosite in my shutterstock profile or it is not nice to advertise own site on microstock official site? Thanks for answers!

Its there for that purpose. The agency doesnt have an exclusive contract with you, so you can sell and link as you please. Its your work, you decide what to do with it. I have linked to my website from all agencies where possible. 

Thanks for answer! Does it have any effect these links adding? Are they counted by google for your site rating?

It works.