Hi im new here to the microstock business.

I found out as i heard about fotolia and ive made an account but im waiting for it to be validated so in the meantime i have some questions...

1. Do you go exclusive? and if so, do you still sell your photos at other microstock agencies (if not, why?)
       Can they find out if you do?
            Is it worth it?

2. What do you actually get when you sell your images/photos?
    I mean, it says for example that you get 1 credit if you sell 1 photo in XS but it then has a 'Contributor Royalty (%)' of 30% if you are non exclusive.

Do you get 30% of 1 credit?   --- Can some1 explain?

Thanks,

Callum